Note: lots of data about the Pokemon bank update has been discovered now that it's been released and will be added into this OP shortly.
As you may already know, the upcoming Pokemon Bank update will allow transfer of Pokemon from Virtual Console R/B/Y games to Sun/Moon.Aside from questions of how IVs and EVs will be preserved/determined when splitting Defense into Def/Sp.D and how Gender/Abilities will be determined, other possibilities this will bring us are more concrete. For example, it's expected you should be able to transfer over "legal" Pokemon obtained using Glitches, such as the Long Range Trainer Glitch which allows you to get Mew if you don't have one from an event.
What we know now:
Gen 1 Pokemon will always have Hidden Ability unless that species doesn't have one, so no No Guard Fissure Machamp.
Gen 1 Pokemon Nature's are determined by the remainder of totalExp/25 (exp modulo 25)
Non-Alolan Vulpix, Sandshrew, Grimer, etc can pass down their non-Alolan form ONLY if the non-Alolan parent is holding an Everstone.
Above mentioned Pokemon can also pass down hidden ability to Alolan form children, so for example Grimer from Gen 1 with HA can produce Alolan Power of Alchemy Grimer as offspring.
Pikachu, Cubone, and Exeggcute from other regions will always evolve into Alolan forms when evolved in Sun/Moon as far as we know. The only way we know to get non-A Raichu, Marowak, or Exeggutor is to transfer them over evolved.
Some Gen1 Pokemon result in "legal" movesets that Sun/Moon will reject as hacked after evolution. For example a Poliwhirl with Metronome is legal, but if you evolve it into Politoed it apparently can no longer be traded over GTS or Wonder Trade because it triggers hack detection. (Source reddit, take with grain of salt.)
Gender is randomly chosen when transferred.
3 Best IVs guaranteed, IVs are randomized and do not correlate to the DVs in gen 1.
A Pokemon will be shiny from Gen 1 if it has specific DVs before transfer but a flaw in the RNG means it's basically impossible to get them from Random Encounters. They have a very low chance from non random encounters like gift Pokemon or stationary Pokemon. You can use Arbitrary Code Execution to manipulate the DVs and force a shiny in transfer, so Shiny Mewtwo/Moltres/etc with Hidden Abilities are "legitimately" obtainable in game without a cheating device.
Mew is blocked from transfer unless it has the same OT and trainer ID as event Mew. Any other Mew is illegal and can't be transferred through the bank. You can circumvent this by changing Mew's OT/ID through Arbitrary Code Execution.
More to come?
What I find most interesting, though, is the ability to transfer over a number of Gen 1 mons which learned TMs or level-up moves only available in Gen 1. Some Pokemon/move combinations which have been pretty much invalid since Gen 3 and the introduction of Abilities will be legal and obtainable again for the first time in nearly fifteen years. I'm not convinced any of them will be storming OU any time soon, but I think it's interesting!
TL;DR: This thread is about fun/funny/viable/nonviable use of Gen 1 "only" moves transferred to Sun/Moon after Pokemon Bank is updated. Let me start us off.
Feel free to pick your own TM to write about or simply comment on the ones listed here. Any particularly awesome theorymoning may be added to this OP.
Interesting TMs and Pokemon that can learn them
Inspiration
This move inspired me to post this thread. Tri Attack is 80 BP, 100 Accuracy, Normal type Special move that can randomly induce burn, freeze, or paralysis. Available to a number of pokemon by level up or egg move in Gen 7, it's available to more Pokemon that come from Gen 1 by use of TM49.
TM49 Tri Attack
Clefable, Wigglytuff, Alakazam, Slowbro, Dodrio, Cloyster, Hypno, Chansey, Starmie,Porygon, Mewtwo, Mew
However this list is unimpressive and the move is not very viable on these mons. (Mega) Alakazam would be the 'best' user, but it has much better offensive moves to use. In lower tiers, Clefable or Wigglytuff could use this as a status/attacking move. A lucky freeze could turn the entire tide of battle, but it's not reliable. Also worth noting, this could be an *extremely* good move for a Serene Grace Eviolite Chansey, however the randomness of which status you get could be disastrous, not to mention we don't know how abilities are determined after transfer.
Two-turn Attacks
Some of these attacks are plain not viable in the current metagame and power creep has all but relegated them to the history books. Still, they are worth discussing.
TM02 Razor Wind - Two turns for 80 BP/Normal/Special/Crit. Next!
Butterfree, Pidgeot, Fearow, Golbat, Venomoth, Farfetch'd, Kabutops, Aerodactyl, Articuno, Zapdos, Moltres, Dragonite, Mew.
TM22 Solar Beam
Lapras can only learn Solar Beam in Gen1, it can't learn it as a TM move in newer generations.
TM40 Skull Bash - This move raises your defense 1 stage on the first turn, then attacks with 130BP/Normal/physical on second turn. With Power Herb, the defense boost is still gained and the entire attack goes off in one turn.
Charizard, Raticate, Arbok, Pika/Raichu, Sandslash, Nidoking, Clefable, Ninetales, Wigglytuff, Parasect, Persian, Golduck, Primeape, Poliwhirl/wrath(/toed), Alakazam, Machamp, Tentacruel, Rapidash, Slowbro, Farfetch'd, Dodrio, Dewgong, Gengar, Hypno, Kingler, Hitmonlee, Hitmonchan, Lickitung, Rhydon, Chansey, Tangela, Kangaskhan, Seadra, Starmie, Mr. Mime, Scyther, Jynx, Electabuzz, Magmar, Tauros, Gyarados, Lapras, Eevee, Porygon, Omastar, Kabutops, Snorlax, Dragonite, Mewtwo, Mew.
TM43 Sky Attack - 140BP, 90 accuracy, 30% flinch, Flying physical.
Pidgeot, Dodrio, Aerodactyl, Articuno, Zapdos, Mew.
Sadly these moves are not very good. Solar beam on Lapras has potential to catch someone extremely off guard and could help Lapras fit into a Sunny Day team somehow, but it doesn't seem viable to me. Razor Wind is useless and Sky Attack isn't great either. Skull Bash + Power Herb for +1 defense and a 130BP normal physical move is a decent combination, but I'm not sure any of the mons on this list can use it well. (Bulba/Squirt get it by breeding or level up in gen 7, and those would be better to use it than almost anything else on this list IMO.)
OHKO Moves (Novelty)
Not much potential here other than novelty and surprise sets, but that's fun so let's discuss. Note: A few Pokemon that learn these moves in Gen 1 are not on this list because they are available in Gen 7 as level up or egg moves, such as Snorlax/Fissure and Rhydon/Horn Drill
TM07 Horn Drill
Nidoqueen, Dewgong, Tauros, Lapras, Dragonite, Mew.
TM27 Fissure
Charizard, Arbok, Sandslash, Nidoking, Poliwhirl/wrath(/toed), Machamp, Golem, Slowbro, Onix, Cubone/Marowak, Lickitung, Rhydon, Kangaskhan, Tauros, Mew.
Not much here that's good for competitive battling, but a number of these Pokemon usually can't obtain OHKO moves. Some of the slower/defensive mons on this list, like Slowbro or Onix(/Steelix), could potentially run these moves to get a surprise KO while the opponent thinks they're safe and brings in something to set-up. Others like Lapras already have access to OHKO moves. Most of these pokemon simply have far better and more consistent options for dealing damage than a 30% chance to OHKO. It was pointed out that Machamp with Fissure and the No Guard ability would be absurd, so again the question is raised of how Abilities will be determined.
Other "Novelty" moves
These moves aren't useful in competitive play, but earn an honorable mention for having decent novelty.
TM16 Pay Day - AKA "Make it rain"
Pikachu/Raichu, Nidoqueen/King, Golduck, Primeape, Slowbro, Dewgong, Rhydon, Snorlax, Mew.
TM20 Rage - A pointless move outranked by any other attack boosting move.
Charizard, Venusaur, Blastoise, Butterfree... OK this list is long, 143/151 gen 1 mons can learn this TM.
TM31 Mimic - Has some theoretical uses but falls flat IMO. Too situational. Could possibly be used in doubles to give a poke an unusual move?
Venusaur, Charizard, Blastoise, Butterfree, Beedrill, Pidgeot, Raticate, Fearow, Arbok, Pika/Raichu, Sandslash, Nidoqueen/king, Ninetales, Wigglytuff, Golbat, Vileplume, Parasect, Venomoth, Dugtrio, Persian, Golduck, Primeape, Arcanine, Poliwhirl/wrath(/toed), Machamp, Victreebel, Tentacruel, Golem, Rapidash, Slowbro, Magneton, Farfetch'd, Dodrio, Dewgong, Muk, Cloyster, Gengar, Onix, Hypno, Kingler, Electrode, Exeggcute/eggutor, Hitmonlee, Hitmonchan, Weezing, Rhydon, Chansey, Tangela, Kangaskhan (!), Seadra, Seaking, Starmie, Scyther, Jynx, Electabuzz, Magmar, Pinsir, Tauros, Gyarados, Lapras, Eevee, Porygon, Omastar, Kabutops, Aerodactyl, Snorlax, Articuno, Zapdos, Moltres, Dragonite, Mewtwo, Mew.
TM35 Metronome - No serious player should ever use this move, but damn is it fun.
Primeape, Poliwhirl/wrath(/toed), Alakazam, Machamp, Golem, Gengar, Hypno, Hitmonlee, Hitmonchan, Mr. Mime, Jynx, Electabuzz, Magmar, Mewtwo.
Mimic is the only one I think is worth discussing here. I bolded the Mega-evolving learners of this move. This move WAS already available in modern games by FRLG Move Tutor, but transferring Gen 1 to Gen 7 is much easier than Gen3-4-5-6-7 and requires only modern hardware. In addition, this unlocks Mimic as a compatible move with Teleport for Slowbro or other moves that Gen 1 pokemon can't learn in Gen3 onwards.
Mew
Mew can learn all TMs, so there are a few interesting moves it can learn that it can't learn in later generations. Notably, it's the only Pokemon aside from Chansey able to learn Softboiled, however in newer Gnerations it can learn Roost so this doesn't add anything new utility-wise. It can also learn the OHKO moves.
I wasted two hours of my life writing this drivel and I hope you found it interesting to read. Thank you.
Edit: In short, there's almost nothing very interesting for sun/moon OU here that I have found, mostly novelties and gimmicks and hyucks.
As you may already know, the upcoming Pokemon Bank update will allow transfer of Pokemon from Virtual Console R/B/Y games to Sun/Moon.
What we know now:
Gen 1 Pokemon will always have Hidden Ability unless that species doesn't have one, so no No Guard Fissure Machamp.
Gen 1 Pokemon Nature's are determined by the remainder of totalExp/25 (exp modulo 25)
Non-Alolan Vulpix, Sandshrew, Grimer, etc can pass down their non-Alolan form ONLY if the non-Alolan parent is holding an Everstone.
Above mentioned Pokemon can also pass down hidden ability to Alolan form children, so for example Grimer from Gen 1 with HA can produce Alolan Power of Alchemy Grimer as offspring.
Pikachu, Cubone, and Exeggcute from other regions will always evolve into Alolan forms when evolved in Sun/Moon as far as we know. The only way we know to get non-A Raichu, Marowak, or Exeggutor is to transfer them over evolved.
Some Gen1 Pokemon result in "legal" movesets that Sun/Moon will reject as hacked after evolution. For example a Poliwhirl with Metronome is legal, but if you evolve it into Politoed it apparently can no longer be traded over GTS or Wonder Trade because it triggers hack detection. (Source reddit, take with grain of salt.)
Gender is randomly chosen when transferred.
3 Best IVs guaranteed, IVs are randomized and do not correlate to the DVs in gen 1.
A Pokemon will be shiny from Gen 1 if it has specific DVs before transfer but a flaw in the RNG means it's basically impossible to get them from Random Encounters. They have a very low chance from non random encounters like gift Pokemon or stationary Pokemon. You can use Arbitrary Code Execution to manipulate the DVs and force a shiny in transfer, so Shiny Mewtwo/Moltres/etc with Hidden Abilities are "legitimately" obtainable in game without a cheating device.
Mew is blocked from transfer unless it has the same OT and trainer ID as event Mew. Any other Mew is illegal and can't be transferred through the bank. You can circumvent this by changing Mew's OT/ID through Arbitrary Code Execution.
More to come?
What I find most interesting, though, is the ability to transfer over a number of Gen 1 mons which learned TMs or level-up moves only available in Gen 1. Some Pokemon/move combinations which have been pretty much invalid since Gen 3 and the introduction of Abilities will be legal and obtainable again for the first time in nearly fifteen years. I'm not convinced any of them will be storming OU any time soon, but I think it's interesting!
TL;DR: This thread is about fun/funny/viable/nonviable use of Gen 1 "only" moves transferred to Sun/Moon after Pokemon Bank is updated. Let me start us off.
Feel free to pick your own TM to write about or simply comment on the ones listed here. Any particularly awesome theorymoning may be added to this OP.
Interesting TMs and Pokemon that can learn them
Inspiration
This move inspired me to post this thread. Tri Attack is 80 BP, 100 Accuracy, Normal type Special move that can randomly induce burn, freeze, or paralysis. Available to a number of pokemon by level up or egg move in Gen 7, it's available to more Pokemon that come from Gen 1 by use of TM49.
TM49 Tri Attack
Clefable, Wigglytuff, Alakazam, Slowbro, Dodrio, Cloyster, Hypno, Chansey, Starmie,
However this list is unimpressive and the move is not very viable on these mons. (Mega) Alakazam would be the 'best' user, but it has much better offensive moves to use. In lower tiers, Clefable or Wigglytuff could use this as a status/attacking move. A lucky freeze could turn the entire tide of battle, but it's not reliable. Also worth noting, this could be an *extremely* good move for a Serene Grace Eviolite Chansey, however the randomness of which status you get could be disastrous, not to mention we don't know how abilities are determined after transfer.
Two-turn Attacks
Some of these attacks are plain not viable in the current metagame and power creep has all but relegated them to the history books. Still, they are worth discussing.
TM02 Razor Wind - Two turns for 80 BP/Normal/Special/Crit. Next!
Butterfree, Pidgeot, Fearow, Golbat, Venomoth, Farfetch'd, Kabutops, Aerodactyl, Articuno, Zapdos, Moltres, Dragonite, Mew.
TM22 Solar Beam
Lapras can only learn Solar Beam in Gen1, it can't learn it as a TM move in newer generations.
TM40 Skull Bash - This move raises your defense 1 stage on the first turn, then attacks with 130BP/Normal/physical on second turn. With Power Herb, the defense boost is still gained and the entire attack goes off in one turn.
Charizard, Raticate, Arbok, Pika/Raichu, Sandslash, Nidoking, Clefable, Ninetales, Wigglytuff, Parasect, Persian, Golduck, Primeape, Poliwhirl/wrath(/toed), Alakazam, Machamp, Tentacruel, Rapidash, Slowbro, Farfetch'd, Dodrio, Dewgong, Gengar, Hypno, Kingler, Hitmonlee, Hitmonchan, Lickitung, Rhydon, Chansey, Tangela, Kangaskhan, Seadra, Starmie, Mr. Mime, Scyther, Jynx, Electabuzz, Magmar, Tauros, Gyarados, Lapras, Eevee, Porygon, Omastar, Kabutops, Snorlax, Dragonite, Mewtwo, Mew.
TM43 Sky Attack - 140BP, 90 accuracy, 30% flinch, Flying physical.
Pidgeot, Dodrio, Aerodactyl, Articuno, Zapdos, Mew.
Sadly these moves are not very good. Solar beam on Lapras has potential to catch someone extremely off guard and could help Lapras fit into a Sunny Day team somehow, but it doesn't seem viable to me. Razor Wind is useless and Sky Attack isn't great either. Skull Bash + Power Herb for +1 defense and a 130BP normal physical move is a decent combination, but I'm not sure any of the mons on this list can use it well. (Bulba/Squirt get it by breeding or level up in gen 7, and those would be better to use it than almost anything else on this list IMO.)
OHKO Moves (Novelty)
Not much potential here other than novelty and surprise sets, but that's fun so let's discuss. Note: A few Pokemon that learn these moves in Gen 1 are not on this list because they are available in Gen 7 as level up or egg moves, such as Snorlax/Fissure and Rhydon/Horn Drill
TM07 Horn Drill
Nidoqueen, Dewgong, Tauros, Lapras, Dragonite, Mew.
TM27 Fissure
Charizard, Arbok, Sandslash, Nidoking, Poliwhirl/wrath(/toed), Machamp, Golem, Slowbro, Onix, Cubone/Marowak, Lickitung, Rhydon, Kangaskhan, Tauros, Mew.
Not much here that's good for competitive battling, but a number of these Pokemon usually can't obtain OHKO moves. Some of the slower/defensive mons on this list, like Slowbro or Onix(/Steelix), could potentially run these moves to get a surprise KO while the opponent thinks they're safe and brings in something to set-up. Others like Lapras already have access to OHKO moves. Most of these pokemon simply have far better and more consistent options for dealing damage than a 30% chance to OHKO. It was pointed out that Machamp with Fissure and the No Guard ability would be absurd, so again the question is raised of how Abilities will be determined.
Other "Novelty" moves
These moves aren't useful in competitive play, but earn an honorable mention for having decent novelty.
TM16 Pay Day - AKA "Make it rain"
Pikachu/Raichu, Nidoqueen/King, Golduck, Primeape, Slowbro, Dewgong, Rhydon, Snorlax, Mew.
TM20 Rage - A pointless move outranked by any other attack boosting move.
Charizard, Venusaur, Blastoise, Butterfree... OK this list is long, 143/151 gen 1 mons can learn this TM.
TM31 Mimic - Has some theoretical uses but falls flat IMO. Too situational. Could possibly be used in doubles to give a poke an unusual move?
Venusaur, Charizard, Blastoise, Butterfree, Beedrill, Pidgeot, Raticate, Fearow, Arbok, Pika/Raichu, Sandslash, Nidoqueen/king, Ninetales, Wigglytuff, Golbat, Vileplume, Parasect, Venomoth, Dugtrio, Persian, Golduck, Primeape, Arcanine, Poliwhirl/wrath(/toed), Machamp, Victreebel, Tentacruel, Golem, Rapidash, Slowbro, Magneton, Farfetch'd, Dodrio, Dewgong, Muk, Cloyster, Gengar, Onix, Hypno, Kingler, Electrode, Exeggcute/eggutor, Hitmonlee, Hitmonchan, Weezing, Rhydon, Chansey, Tangela, Kangaskhan (!), Seadra, Seaking, Starmie, Scyther, Jynx, Electabuzz, Magmar, Pinsir, Tauros, Gyarados, Lapras, Eevee, Porygon, Omastar, Kabutops, Aerodactyl, Snorlax, Articuno, Zapdos, Moltres, Dragonite, Mewtwo, Mew.
TM35 Metronome - No serious player should ever use this move, but damn is it fun.
Primeape, Poliwhirl/wrath(/toed), Alakazam, Machamp, Golem, Gengar, Hypno, Hitmonlee, Hitmonchan, Mr. Mime, Jynx, Electabuzz, Magmar, Mewtwo.
Mimic is the only one I think is worth discussing here. I bolded the Mega-evolving learners of this move. This move WAS already available in modern games by FRLG Move Tutor, but transferring Gen 1 to Gen 7 is much easier than Gen3-4-5-6-7 and requires only modern hardware. In addition, this unlocks Mimic as a compatible move with Teleport for Slowbro or other moves that Gen 1 pokemon can't learn in Gen3 onwards.
Mew
Mew can learn all TMs, so there are a few interesting moves it can learn that it can't learn in later generations. Notably, it's the only Pokemon aside from Chansey able to learn Softboiled, however in newer Gnerations it can learn Roost so this doesn't add anything new utility-wise. It can also learn the OHKO moves.
I wasted two hours of my life writing this drivel and I hope you found it interesting to read. Thank you.
Edit: In short, there's almost nothing very interesting for sun/moon OU here that I have found, mostly novelties and gimmicks and hyucks.
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