Chikorita/Cyndaquil/Totodile lines
Starters. Like in all other Pokémon games, you are guaranteed to get one of them in the beginning of the game, but you only get one and have to trade in order to get the others. And like in almost every other Pokémon game, no members of the starter lines can be found in the wild in any of the Johto games.
Rate:
Elusive
Sentret line
Sentret can be found on Route 29 in all games with a 40% chance of appearing during Morning and Day. In Crystal, it can also be found on Route 43 with a 30% chance of appearing during Morning and Day. In HG/SS, it can be found in the following areas in the Safari Zone: Wetland during Morning and Day, Swamp at all times. No blocks required. Sentret can also be found on Route 1 in Kanto in all games, it has a 20% chance of appearing there during Morning and Day.
In Crystal, Furret can be found on Route 43 during Morning and Day with a 15% chance of appearing. It is also found on Kanto Route 1 in all games, as well as in the Wetland and Swamp areas in the Safari Zone in HG/SS, but that requires blocks.
Rate:
Uncommon
Hoothoot line
Hoothoot can be found in a ton of locations at varying encounter rates. It is more common in Crystal & HG/SS than in G/S. However, it can only be found at Night when it comes to regular encounters. In Crystal and HG/SS, Hoothoot can also be found through Headbutt in various areas, during all times of day.
Noctowl is found at Night in various areas just like Hoothoot. But it is not found in as many areas as Hoothoot, nor is it as common. It is found in more areas in Crystal than in G/S & HG/SS. Like with Hoothoot, it can also be found through Headbutt, but only in Ilex Forest in Crystal, at all times of day.
Rate:
Common
Ledyba line
Version exclusive, only found in Silver, Crystal and SoulSilver.
Ledyba can be found in a few locations with a 30-40% chance of appearing, but only in the Morning except for at Kanto Route 2 in SoulSilver where it has a 4% chance to appear during the Day as well. In Crystal and SoulSilver, it can also be found through Headbutt at various areas at all times of day.
Ledian has a 5% chance of appearing at Route 2 during the Morning in Silver & Crystal, but a 9% chance in SoulSilver. In Crystal, Ledian also has a 5% chance of appearing at Route 37 in the Morning. In SoulSilver, Ledian can also be found through Headbutt in Viridian Forest in the Morning, with a 10% chance of appearing.
Rate:
Uncommon
Spinarak line
Version exclusive, only found in Gold, Crystal and HeartGold.
Spinarak and Ariados have generally the same encounter rates as Ledyba and Ledian, the difference is that they are only found during the Night as opposed to in the Morning. Ariados is slightly less common on Kanto Route 2 in HeartGold compared to Ledian in SoulSilver, it has a 5% chance to appear there compared to Ledian’s 9%.
Rate:
Uncommon
Crobat
Not found in the wild in any of the Johto games.
Zubat can be found in a ton of locations in all Johto games and is common in the majority of them. The same goes for Golbat even if it is somewhat more uncommon than Zubat. Golbat evolves into Crobat through Friendship, which can be difficult and take a long time to get done.
Rate:
Common (Pre-evolutions only)
Chinchou line
Chinchou can be found through fishing at various places. It is available with both the Good Rod and the Super Rod.
Chinchou is more common with the Good Rod in G/S/C compared to in HG/SS. It has a 20% to appear in G/S/C, but only a 7% chance in HG/SS. However, it the other way around with the Super Rod as it has a 40% chance to appear with it in G/S/C but a 60% chance in HG/SS.
Lanturn can also be found through fishing, but only with the Super Rod. It is also rarer than Chinchou as it has a 10% chance of appearing in G/S/C, and a 3% chance in HG/SS.
Rate:
Uncommon (G/S/C) /
Rare (HG/SS)
Pichu
Baby Pokémon, not found in the wild.
Wild Pikachu can be found at Route 2 in G/S/C and in Viridian Forest in HG/SS, but that is post-game only.
Raichu is not found in the wild at all in any Johto game.
In Crystal, Pichu can hatch from the Odd Egg, the odds of getting one is 9% (8% chance of a regular, 1% chance of a shiny).
In Crystal, Pikachu can also be bought from the Celadon Game Corner for 2222 coins, but that is also post-game only.
In HG/SS, you can also get a (French) Pikachu from a trade with Lt. Surge during the post-game if you give him another Pikachu. So that doesn’t really help.
In HG/SS only, a Spiky-Eared Pichu can be obtained at Ilex Forest if you have the Event Pikachu-colored (Shiny) Pichu.
Rate:
Elusive (Crystal)
Post-game:
Rare (Pikachu, G/S & HG/SS)
Cleffa
Baby Pokémon, not found in the wild.
Clefairy can be found in Mt. Moon in all games. It has a 5% chance to appear in G/S and HG/SS at all times. The same mostly goes for Crystal, but here it has a 25% to appear during Night at 1F.
It can also be found at night in the Meadow area in the Safari Zone in HG/SS with a 10% chance of appearing, blocks are not required, but they can be used to increase the levels of the Clefairy from 17 to 42.
In Crystal, Cleffa can hatch from the Odd Egg, with a 19% chance of getting one (16% for a regular, 3% for a shiny).
Clefable is not found in the wild in any of the Johto games.
Rate:
Elusive (Crystal) /
Rare (Clefairy, HG/SS)
Post-game:
Rare (Clefairy, G/S)
Igglybuff
Baby Pokémon, not found in the wild.
In G/S, Jigglypuff is found on Route 46, with a 5% chance of appearing. In Crystal, it can be found at routes 34/35 with a 5% chance of appearing. In HG/SS, Jigglypuff can be found at the Meadow and Swamp areas at the Safari Zone with a 40% chance of appearing, but it is not found at Night at the Swamp area. No blocks required.
During the post-game, Jigglypuff is also found at Routes 3/4 in G/S and HG/SS, while it is found at Routes 5/6/7 in Crystal.
In Crystal, Igglybuff can hatch from the Odd Egg, with a 19% chance of getting one (16% for regular, 3% for shiny).
Wigglytuff is not found in the wild in any of the Johto games.
Rate:
Elusive (Crystal) /
Rare (Jigglypuff, G/S) /
Uncommon (Jigglypuff, HG/SS)
Togepi/Togetic
Not found in the wild.
In all Johto games, the only way to get a Togepi is to hatch the Egg you get from Professor Elm’s assistant during the story. Similar to the starters, you are guaranteed to get a Togepi, but you only get one.
Togetic is not found in the wild, so it has to be evolved from Togepi. It evolves through Friendship, which can be difficult and take a long time to get done.
Togekiss is not found in the wild in HG/SS, it is not in the Johto Dex either.
Rate:
Elusive
Natu line
Natu has a 90% chance to appear in the grass outside of Ruins of Alph, but in order to get there, you must backtrack through Union Cave after getting Surf and Strength.
Xatu is not found in the wild, but in Crystal and HG/SS, a Xatu can be obtained through an in-game trade with an NPC in Pewter City during the post-game, said trade requires a Haunter.
Rate:
Uncommon
Mareep line
Version exclusive, only found in G/S and HG/SS.
In all of these games, Mareep can be found at Routes 32, 42 and 43. It is less common on Route 43, as well as less common during Night at Routes 32 and 43. It is more common in Silver and SoulSilver on Route 42 (50% chance to appear, as opposed to 30% in Gold and HeartGold).
In HG/SS, Mareep can also be found at the Rocky Beach area in the Safari Zone, but that requires blocks.
Flaaffy can be found at Routes 42/43, with a 10% chance of appearing at Route 42 and a 30/40% chance on Route 43.
Ampharos is not found in the wild in any of the Johto games.
In HG/SS, you can also get a Mareep from a Gift Egg if you input a special code to a person in Violet City, see the intro for instructions.
Rate:
Uncommon
Bellossom
Not found in the wild.
Oddish can be found at Ilex Forest during the Night with a 60% chance of appearing in G/S & HG/SS, 50% in Crystal. In Kanto, it is found at Routes 5/6/24/25 in G/S & HG/SS, but only on Routes 24/25 in Crystal. In HG/SS, wild Oddish can also be found in the Marshland area in the Safari Zone during the Night with a 5% chance of appearing, no blocks needed.
Wild Gloom can be found at Route 5 in G/S, Route 24 in Crystal, Routes 47/48, 5/6 and in the Marshland area in the Safari Zone in HG/SS. No blocks needed, but using them will increase the level of Gloom and might make it more or less common. Like with Oddish, it only appears during the Night in all games and areas except for with blocks in the Safari Zone.
To evolve Gloom into Bellossom, a Sun Stone is required.
Rate:
Uncommon (Pre-evolutions only) /
Unavailable (in the wild)
Marill line
In G/S and HG/SS, Marill has a 1% chance to appear at Mt. Mortar outside of Swarms.
In Crystal, Marill is found at higher rates (5-30%) at both Mt. Mortar and Route 42, with Surf giving the highest chance of finding one.
In HG/SS, Marill is also found at the Meadow area in the Safari Zone, either through Surf or in the grass at Night, no blocks needed.
Azumarill is not found in the wild in any of the Johto games.
In HG/SS, Azurill is not a part of the Johto Dex. It can be found in the wild at the Savannah area in the Safari Zone, but that requires blocks.
Rate:
Mythological (Regularly in G/S) /
Uncommon (Regularly in Crystal, during a Swarm in G/S) /
Rare (HG/SS)
Sudowoodo
In all Johto games, Sudowoodo appears as a roadblock on Route 36, it can be battled once you get the Squirtbottle. It must be caught or defeated in order to progress, but you only get to face one in the entire game. In G/S/C, it will be lost forever if defeated, but in HG/SS, it will respawn after beating the game if it is defeated the first time.
In HG/SS, Bonsly is not found in the wild, it is not a part of the Johto Dex either.
Rate:
Elusive
Politoed
Not found in the wild.
Wild Poliwag can be found in many different locations in all Johto games, both through Surfing and fishing (with all rods) or even in grass in some areas. Poliwhirl is similar, it can also be found in many areas, but in fewer than Poliwag. It is also generally less common.
In order to make Poliwhirl evolve into Politoed, it needs to be traded while holding a King’s Rock.
Rate:
Common (Pre-evolutions only) /
Unavailable (in the wild)
Hoppip line
Hoppip can be found on some routes in both Johto and Kanto with a varying chance of appearing, between 5-35%. In Crystal, it is found on more routes in Johto but has lower encounter rates. In HG/SS, it is also found on Route 48 and in the Meadow area in the Safari Zone, no blocks required.
Skiploom is found on Route 14 in all games, and the Meadow area in the Safari Zone in HG/SS, no blocks needed but they can increase its level and possibly change its rate of appearance.
Jumpluff is not found in the wild in G/S/C. In HG/SS, it can be found in the Marshland area in the Safari Zone, but that requires blocks.
Rate:
Common
Aipom
Wild Aipom can be found in many areas in all Johto games, but only through Headbutt. It has a 20% chance of appearing in G/S/C and a 20-30% chance of appearing in HG/SS.
Ambipom is not found in the wild in HG/SS.
Rate:
Uncommon
Sunkern line
Sunkern is found in the National Park with a 25% chance of appearing, and at Route 24 in Kanto with a 30% chance of appearing. It only appears during the Day. It also appears in the Meadow area in the Safari Zone in HG/SS, no blocks required.
Sunflora is not found in the wild in any of the Johto games.
To evolve Sunkern into Sunflora, a Sun Stone is required.
Rate:
Uncommon
Yanma
In all Johto games, Yanma is found at Route 35 with a 1% chance of appearing outside of Swarms. This is a Pokémon that is the very definition of Johto Syndrome.
In HG/SS, Yanmega is not found in the wild.
Rate:
Mythological (Regularly, all games) /
Uncommon (During a Swarm, G/S/C)
Wooper line
Wooper can be found through Surfing in Union Cave or at Ruins of Alph in G/S/C, as well as in the Grass in Route 32. It has a higher chance of appearing at Night in G/S, while it only appears at Night in Crystal. In Crystal, it also appears as an overworld encounter at Night at the Grass in the outside area of Ruins of Alph, and on the floor inside of Union Cave.
In HG/SS, Wooper appears in the grass in Route 32 at Night, through Surfing at Ruins of Alph or in Union Cave, or through Surfing at Cliff Edge Gate and as a floor encounter at Cliff Cave. It also appears in the Meadow, Wetland and Marshland areas in the Safari Zone during Night, no blocks needed.
Quagsire can be found in the wild as well, it actually appears in more areas than Wooper and has a higher chance of appearing as well.
In HG/SS, you can also get a Wooper from a Gift Egg if you input a special code to a person in Violet City, see the intro for instructions.
Rate:
Common
Espeon/Umbreon
No members of the Eevee line can be found in the wild in any of the Johto games.
In all Johto games, Eevee is a Gift Pokemon you can receive from Bill in Goldenrod City.
Both Espeon and Umbreon evolve through Friendship, which can be hard and take a long time to get done. Eevee evolves into Espeon during Morning and Day, and into Umbreon during the Night.
In G/S and HG/SS, you can buy Eevee from the Celadon Game Corner in the post-game for 6666 coins.
Rate:
Elusive
Murkrow
In G/S/C, Murkrow can be found at Routes 7 & 16/18 at Night. In HG/SS, it is found at Routes 7 & 16 during the Night and at the Swamp area of the Safari Zone, no blocks needed but they do make it somewhat more common.
Honchkrow is not found in the wild in HG/SS, it is not a part of the Johto Dex either.
Rate:
Rare (HG/SS)
Post-game:
Rare (G/S/C)
Slowking
Not found in the wild.
Slowpoke is found in Slowpoke Well and Tohjo falls in all Johto games. In Slowpoke Well, it has a 15% chance of appearing on the floor and 90-100% chance to appear through Surfing. In Tohjo Falls, it has a 15% chance to appear on the floor and 30% chance to appear through Surfing. In HG/SS, Slowpoke is also found at Rocky Beach area in the Safari Zone, no blocks needed.
In order to make Slowpoke evolve into Slowking, it needs to be traded while holding a King’s Rock.
Rate:
Uncommon (Pre-evolution only) /
Unavailable (in the wild)
Misdreavus
In G/S/C, it is only found at Mt. Silver, which is post-game only and the very last area you get to in the games. In HG/SS, it is found at Mt. Silver but also in Cliff Cave with a 5% chance to appear at Night. It also appears in the Forest area of the Safari Zone during Morning and Day with a 15% chance to appear, no blocks required.
In HG/SS, Mismagius is not found in the wild. It is not a part of the Johto Dex either.
Rate:
Uncommon (HG/SS)
Post-game:
Rare (G/S/C)
Unown
In all Johto games, Unown can be found inside of the Ruins of Alph after at least one of the slide puzzles have been completed, doesn’t matter which one. Unown has a 100% chance to appear here, but it is the only area in the games where it can be found.
Rate:
Uncommon
Wobbuffet
In G/S/C, Wobbuffet is only found in the Route 45 part of Dark Cave, with a 15% chance of appearing. In Crystal, you can also get it from the Game Corner in Goldenrod City for 1500 Coins.
In HG/SS, it also appears in the Peak area of the Safari Zone during the Night, no blocks needed. In the post-game, it can also be found in Cerulean Cave.
In HG/SS, Wynaut is not found in the wild, nor is it a part of the Johto Dex.
Rate:
Uncommon
Girafarig
Version exclusive, only appears in G/S & HG/SS.
In G/S, it only appears at Route 43 where it has a 30% chance of appearing.
It is the same in HG/SS, but here it also appears at Route 48 with a 5% chance of appearing, and in the Plains area in the Safari Zone with a 10% chance to appear, no blocks needed.
Rate:
Uncommon
Pineco line
Pineco appears in many areas, but only through Headbutt. In all Johto games, there is a 30% chance to find one from all of the trees that it can appear from.
Forretress does not appear in the wild in any of the Johto games.
Rate:
Uncommon
Dunsparce
Dunsparce only appears in Dark Cave, on the Route 31 side. It has a 1% chance to appear as a regular encounter outside of Swarms, but a 90% chance through Rock Smash in HG/SS.
Rate:
Mythological (Regularly in G/S/C) /
Uncommon (Regularly in HG/SS, during a Swarm in G/S/C)
Gligar
Version exclusive, only appears in Gold, Crystal and HeartGold.
It has a 20% chance to appear on Route 45 in these games.
Gliscor is not found in the wild in HG/SS, it is not a part of the Johto Dex either.
Rate:
Uncommon
Steelix
Not found in the wild in G/S/C, but it is in HG/SS. Here, it has a 2% chance to appear in Cliff Cave. In the post-game, it also has a 20% chance to appear at 1F in Mt. Silver.
Onix has a 5-10% chance of appearing at Union Cave during the main game, and a 15-20% chance of appearing in Victory Road. In HG/SS, Onix can also be found at Cliff Cave and at the Wasteland area in the Safari Zone, no blocks needed. In the post-game, it is also found in Rock Tunnel and Mt. Silver in all Johto games.
Onix can also be obtained through an in-game trade in Violet City in all games, which requires a Bellsprout (which in turn is easily found on the nearby Routes 31/32).
In order to evolve Onix into Steelix, it must be traded while holding a Metal Coat.
In HG/SS, you can also trade for a Steelix with Jasmine. This requires you to first beat the main game and then beat Jasmine in a rematch at Saffron City. After that, you can trade with her, she will accept any Pokémon for her Steelix.
Rate:
Mythological (in the wild, HG/SS) /
Unavailable (in the wild, G/S/C) /
Uncommon (Onix, all games)
Snubbull line
In G/S & HG/SS, Snubbull has a 1% chance to appear outside of Swarms on Route 38. In Crystal, it appears on Routes 34/35 and on Routes 6/7/8 in Kanto, with a 30% chance of appearing at all times.
In Crystal, wild Granbull can be found on Route 6 in Kanto with a 5% chance to appear during Morning and Day.
Rate:
Mythological (Regularly in G/S & HG/SS) /
Uncommon (Regularly in Crystal, during a Swarm in G/S)
Qwilfish
In G/S/C, it can found on Route 32 at all times with a 10% chance of appearing, but only with the Super Rod, which means it is post-game only. The chance is higher on Route 32 when there is a Swarm. During a Swarm, it can be found with all Rods. It can also be found on Routes 12/13 in Kanto.
In HG/SS, it is found on the same Routes as in G/S/C, but only with a 2-3% chance to appear outside of Swarms (which only happen on Route 32), which raises it to 90%. In the remakes, it can be found with the Good Rod as well, but only on Route 32. On the other routes, it is only found with the Super Rod.
Rate:
Unavailable (G/S/C, Regularly) /
Uncommon (G/S/C, during a Swarm) /
Mythological (HG/SS)
Scizor
Not found in the wild.
Scyther can only be found in the Bug Catching Contest at the National Park, which is held on Tuesdays, Thursdays and Saturdays. It has a 5% chance to appear there.
In order to evolve Scyther into Scizor, it must be traded while holding a Metal Coat.
Rate:
Rare (Pre-evolution only) /
Unavailable (in the wild)
Shuckle
In G/S/C, it is found through Rock Smash at Route 40, Cianwood City, Burned Tower and Dark Cave. It has a 10% chance of appearing, providing you get a Pokémon to appear at all.
In HG/SS, it is found in fewer locations than in G/S/C. Here, it only appears in Cianwood City during the main game. In the post-game, it can also be found in the Marshland area in the Safari Zone (which requires blocks), and in Vermilion City.
You can also receive a “gift” Shuckle from a person in Cianwood City, but you will have to give it back at a later point if you want to keep your honesty intact. However the original owner will let you keep this Shuckle if you have gotten friendly enough with it.
Rate:
Rare
Heracross
In G/S/C, it is found at various places through Headbutt, with a 30% chance of appearing. It is found at fewer areas in Crystal than in G/S.
In HG/SS, it seems to be mostly the same as in G/S, but the rate of finding one varies between 20 and 30%.
Rate:
Uncommon
Sneasel
In G/S and HG/SS, Sneasel is only found at Route 28 & Mt. Silver, both of which are post-game only. It is somewhat more common in HG/SS.
In Crystal, Sneasel is only found at Night in the Ice Path, at rates varying between 1 and 10% depending on the floor.
In HG/SS, Weavile is not found in the wild, it is not a part of the Johto Dex either.
Rate:
Rare (Crystal) /
Unavailable (G/S & HG/SS)
Post-game:
Rare (G/S) /
Uncommon (HG/SS)
Teddiursa line
Version exclusives with a twist: only found in Gold, Crystal and SoulSilver. In the Japanese and Korean versions of the Gen 2 games, they are exclusive to Silver instead of Gold.
In Gold, Teddiursa can be found at Route 45 with a 10% chance of appearing.
In Crystal, Teddiursa can be found at the Route 31 & 45 parts of Dark Cave with a 5% chance of appearing, but only in the Morning.
In SoulSilver, Teddiursa can be found at Route 45 like in Gold, but it can also be found at Mt. Silver during the post-game.
Ursaring is a lot more common than Teddiursa. In Gold and Crystal, it can be found in several places, notably Mt. Silver and Route 28 (Gold only) which are post-game only, but also in Victory Road (Gold) or Dark Cave (Crystal) before the post-game.
In SoulSilver, Ursaring’s locations are mostly similar to in Gold.
Rate:
Uncommon
Slugma line
In the wild, Slugma can only be found at Routes 16/17/18 in Kanto. It has a 35% chance to appear on Route 17 during the Day, otherwise a 5% chance to appear.
Magcargo is not found in the wild in any of the Johto games.
In HG/SS, you can also get a Slugma from a Gift Egg if you input a special code to a person in Violet City, see the intro for instructions.
Rate:
Unavailable (G/S/C) /
Elusive (HG/SS)
Post-game:
Uncommon
Swinub/Piloswine
In all Johto games, Swinub is found at Ice Path with a 40% chance of appearing. In Crystal, it does not appear at Night.
Piloswine is not found in the wild in any of the Johto games.
In HG/SS, Mamoswine is not found in the wild either.
Rate:
Uncommon
Corsola
In G/S/C, Corsola can be found through fishing at various areas. It has a 10% chance to appear with the Good Rod and a 30% chance to appear with the Super Rod, but it does not appear at Night.
In HG/SS, it appears at fewer areas (as well as in some different areas compared to G/S/C), but it now appears at all times and not only at Morning/Day. The rates have also changed for the Good Rod, it now only has a 3% chance to appear as opposed to a 10% chance in G/S/C.
Rate:
Rare (G/S/C) /
Mythological (HG/SS)
Remoraid line
Version exclusive, only found in G/S & HG/SS.
In G/S, it can be found through fishing at Route 44 with a 10% chance of appearing, but only with the Super Rod, which means it is post-game only. During a Swarm, it has higher chances of appearing and can be found with the Old and Good Rods as well.
In HG/SS, it can be found through fishing at Route 44, this time with both the Good and Super Rod, but only with a 2% chance of appearing regularly. The rate raises to 90% during swarms.
Octillery is not found in the wild in any of Johto games.
Rate:
Unavailable (G/S, regularly) /
Uncommon (G/S, during a Swarm) /
Mythological (HG/SS)
Post-game:
Rare (G/S)
Delibird
Version exclusive, only found in Silver, Crystal and SoulSilver.
In Silver and SoulSilver, Delibird has a 20% chance of appearing in all areas of the Ice Path. In Crystal, it has a 40% chance of appearing, but it only appears at Night.
Rate:
Uncommon
Mantine
Version exclusive, only found in Gold, Crystal and HeartGold.
In all three games, Mantine has a 10% chance of appearing on Route 41.
In HeartGold, Mantyke is not found in the wild, and is not a part of the Johto Dex.
Rate:
Rare
Skarmory
Version exclusive, only found in Silver, Crystal and SoulSilver.
In all games, it has a 5% chance to appear on Route 45. In Crystal, it is not found at Night.
Rate:
Rare
Houndour line
In all games, Houndour can be found regularly on Route 7 during the Night, which is post-game only. It has a 5% chance to appear in G/S and HG/SS, but a 20% chance to appear in Crystal.
In HG/SS, it can also be found at the Savannah area in the Safari Zone, but that requires blocks.
Houndoom is not found in the wild in G/S/C. In HG/SS, it can be found at the Plains area in the Safari Zone, which also requires blocks.
Rate:
Unavailable
Post-game:
Rare (G/S & HG/SS) /
Uncommon (Crystal)
Kingdra
Not found in the wild.
Wild Horsea can be found at Whirl Islands at various rates in all games, the best chance to find one is through Surfing. It is more common in G/S/C than in HG/SS.
Seadra can be found in the same areas as Horsea, but it has a lower chance of appearing and appears in somewhat fewer areas.
In HG/SS, wild Horsea and Seadra can also be found at Seafoam Islands in Kanto during the post-game
In order to evolve Seadra into Kingdra, it must be traded while holding a Dragon Scale.
Rate:
Uncommon (Pre-evolutions only) /
Unavailable (in the wild)
Phanpy line
Version exclusives with a twist: only found in Silver, Crystal and HeartGold. In the Japanese and Korean versions of the Gen 2 games, they are exclusive to Gold instead of Silver.
In Silver, Phanpy can be found at Route 45 with a 10% chance of appearing. In Crystal, it has a 5% chance of appearing at Routes 45/46, but only in the Morning. In HeartGold, it appears on Route 45 just like in Silver, but it is also found at Mt. Silver during the post-game.
In Silver and HeartGold, Donphan can be found at Mt. Silver, Route 28 and Victory Road with a 10-30% chance of appearing. In Crystal, it is only found on Route 45 with a 10% chance to appear during Morning and a 15% chance to appear during the Day.
Rate:
Uncommon
Porygon2
Not found in the wild. Neither is Porygon, but it can be bought at the Celadon Game Corner for 9999 coins (G/S & HG/SS) or 5555 coins (Crystal). But that is post-game only.
In order to evolve Porygon into Porygon2, it must be traded while holding an Up-Grade.
Porygon-Z is not found in the wild in HG/SS, it is not a part of the Johto Dex either.
Rate:
Unavailable
Post-game:
Elusive (Pre-evolution only) /
Unavailable (in general, not found in the wild or anywhere else)
Stantler
In G/S, Stantler appears at Routes 36 & 37. It has a 5% chance of appearing on Route 36 and a 30% chance to appear on Route 37.
In Crystal, it only appears on Route 37 at Night, with a 40% chance of doing so.
In HG/SS, it appears on the same routes as in G/S as well as at the Plains area in the Safari Zone, no blocks required.
Rate:
Uncommon
Smeargle
Smeargle appears at the Grass outside of Ruins of Alph (requires backtracking and HMs, same as for Natu) with a 10% chance of appearing at all times except at Night in Crystal where it doesn’t appear.
In HG/SS, it also appears in the Plains area of the Safari Zone during Morning and Day, no blocks needed.
Rate:
Rare
Tyrogue/Hitmontop
Tyrogue is a baby Pokémon and not found in the wild.
In all Johto games, a Tyrogue can be obtained from Black Belt Kiyo in Mt. Mortar after beating him. This requires backtracking, several HMs, and an empty spot in the party.
In Crystal, Tyrogue has a chance to hatch from the Odd Egg. There is a 10% chance of getting a normal one and a 1% chance of getting a shiny, for a total of 11%.
None of the Hitmons are found in the wild in any of the Johto games.
Rate:
Elusive
Smoochum
Baby Pokémon, not found in the wild.
Wild Jynx can be found at rates between 1 and 10% at Ice Path in all Johto games. In HG/SS, Jynx is also found at Seafoam Islands during the post-game.
In Crystal, Smoochum has a chance to hatch from the Odd Egg. There is a 14% chance of getting a regular one, and 2% chance of getting a shiny, for a total of 16%.
Rate:
Elusive (Crystal) /
Rare (Jynx, G/S & HG/SS)
Elekid
Baby Pokémon, not found in the wild.
Electabuzz is only found at Route 10 in Kanto where it has a 5-10% chance of appearing. In HG/SS, Electabuzz is also found in the Forest area of the Safari Zone, but that requires blocks.
Electivire is not found in the wild in HG/SS, it is not a part of the Johto Dex either.
In Crystal, Elekid has a chance to hatch from the Odd Egg. There is a 12% chance of getting a regular one, and 2% chance of a shiny, for a total of 14%.
Rate:
Elusive (Crystal) /
Unobtainable (G/S & HG/SS)
Post-game:
Rare (Electabuzz, all games)
Magby
Baby Pokémon, not found in the wild.
Magmar is found at the Burned Tower in G/S & HG/SS with a 5-10% chance of appearing. In Crystal, Magmar is only found at Mt. Silver, which is post-game only. In HG/SS, it can also be found at the Peak area in the Safari Zone. It has a 10% chance to appear there, but only during Morning and Day.
In Crystal, Magby has a chance to hatch from the Odd Egg. There is a 10% chance of getting a regular one, and 2% chance of a shiny, for a total of 12%.
In HG/SS, Magmortar is not found in the wild, it is not a part of the Johto Dex either.
Rate:
Elusive (Crystal) /
Rare (Magmar, G/S & HG/SS)
Miltank
In G/S/C, Miltank has a 5% chance to appear on Routes 38 & 39, it does not appear at Night in Crystal. In HG/SS, it is the same as in G/S/C, but here it can also be found at Route 47 with a 20% chance of appearing. But in order to reach that area, you must backtrack once you have obtained Waterfall.
Rate:
Rare
Blissey
Not found in the wild.
In all games, Chansey has a 1% chance to appear outside of swarms on Routes 13/14/15 in Kanto. It can also be found at the Meadow area in the Safari Zone in HG/SS, but that requires blocks.
In HG/SS, Happiny is not found in the wild, and it is not a part of the Johto Dex either.
Rate:
Unavailable
Post-game:
Mythological (Pre-evolution, G/S/C) /
Rare (Pre-evolution, HG/SS)
Raikou/Entei/Suicune
Legendaries. In G/S, all three are roamers. In Crystal and HG/SS, Suicune is not a roamer. The ones that roam will start roaming around Johto once they have been interacted with at the Burned Tower. They will not be roaming in Kanto, only in Johto (but not at Mt. Silver, I think).
In Crystal, Suicune is a mandatory legendary encounter at Tin Tower during the main game. If it is defeated there, it will not respawn and will be unobtainable forever.
In HG/SS, Suicune cannot be captured until the post-game since it doesn’t appear for capture until you reach Route 25 in Kanto.
Rate:
Elusive (Raikou & Entei in all games, Suicune in G/S/C) /
Unavailable (Suicune in HG/SS)
Post-game:
Elusive (Suicune, HG/SS only)
Larvitar line
In G/S, Larvitar appears in most areas of Mt. Silver with a 5% chance of appearing at all times. In Crystal, it is mostly the same as in G/S but it only appears during Morning and Day, and it has a 9% chance to appear in the deepest part of the cave.
In Crystal, Larvitar can also be bought at the Celadon Game Corner for 8888 coins.
In Crystal, Pupitar has a 1% chance of appearing in the deepest part of Mt. Silver during Morning and Day.
In HG/SS, Larvitar is found at Mt. Silver 5% of the time in all areas except for on the top, where it instead is found 10% of the time. During the main game, it can also be found in the Mountain area of the Safari Zone during Morning and Day, no blocks required.
In HG/SS, Pupitar can also be found in one area in Mt. Silver, but I’m unsure about which one, Serebii and Bulbapedia say different things. According to
shiny finder's Encounter slots, it is found at “Mt. Silver 3F”. Either way, it has a 5% chance to appear in whichever area it now appears in.
Tyranitar does not appear in the wild in any of the Johto games.
Rate:
Unavailable (G/S/C) /
Rare (HG/SS)
Post-game:
Rare (G/S/C)
Lugia
Legendary. Requires the Silver Wing in order to appear.
In all games, it can be found at the bottom of the Whirl Islands. In Silver and SoulSilver, it is available before beating the game as you get the Silver Wing during the main story, after beating Team Rocket at the Radio Tower in Goldenrod. In SoulSilver, Lugia is a mandatory encounter and must be caught/defeated in order to progress with the game (if defeated, it will respawn during the post-game). In Silver, it is 100% optional.
In Gold, Crystal and HeartGold, it is only available during the post-game since you receive the Silver Wing from an NPC in Pewter City in those games.
Rate:
Elusive (Silver & SoulSilver)
Post-game:
Elusive (Gold, Crystal & HeartGold)
Ho-Oh
Legendary. Requires the Rainbow Wing in order to appear.
In all games, it can be found at the top of the Tin/Bell Tower. In Gold and HeartGold, it is available before beating the game as you get the Rainbow Wing during the main story, after beating Team Rocket at the Radio Tower in Goldenrod. In HeartGold, it is a mandatory encounter and must be caught/defeated in order to progress with the game (if defeated, it will respawn during the post-game). In Gold, it is 100% optional.
In Silver, Crystal and SoulSilver, it is only available during the post-game. In Silver and SoulSilver, the Rainbow Wing is obtained from an NPC in Pewter City.
In Crystal, you get the Rainbow Wing from the Wise Trio Sages at Tin Tower after catching Raikou, Suicune and Entei and beating the main game. The three legendary beasts must be present in the party or the Pokémon Storage System with the same OT/ID as the player in order to obtain the Rainbow Wing.
Rate:
Elusive (Gold & HeartGold)
Post-game:
Elusive (Silver, Crystal & SoulSilver)
Celebi
Mythical.
In the original G/S/C, VC G/S as well as HG/SS, it is not available normally and must be obtained through an event. In VC Crystal only, it can be found in Ilex Forest after beating the main game.
Rate:
Unavailable outside of Events (Original G/S/C, VC G/S & HG/SS)
Post-game:
Elusive (VC Crystal only)
