1) This Odyssey covers (and contains spoilers of) the first four arcs of Pokémon Adventures (Red, Green & Blue; Yellow; Gold, Silver & Crystal; Ruby & Sapphire). All questions should be answered as if only those arcs exist (chapters PS001 - PS267, VIZ Media). In case there are multiple answers, list them alphabetically. If you have already read this part of the manga, or don't mind being spoiled, proceed with /scavenge spoilers are ok. Oh, and before you go, a piece of advice: the answers to the questions are important, but where you found them will also be of use. Good luck!
[Spoilers are OK]
2) This Pokémon indirectly caused Crystal's arms to break.
[Arcanine]
3) Fishing this Pokémon is supposed to be hard. In fact, a Swimmer spent 10 days straight looking for one.
[Feebas]
4) After accidentally releasing a lot of Pokémon in Oak's lab, Red helps him recapture them. This is the second to last Pokémon they capture.
[Meowth]
5) Mumu evolves for the second time in the same chapter Sapphire earns this badge.
[Feather Badge / Feather]
6) A group of people using this Pokémon suggest making Gold bald.
[Bellsprout]
7) A volume cover shows the protagonists flying using Pokémon. List every non-Flying type Pokémon that appears in that cover.
[Jigglypuff, Remoraid]
8) This is the Pokémon Red's Bulbasaur defeats right before evolving into Ivysaur.
[Primeape]
9) This Pokémon kidnaps a baby in the Indigo Plateau.
[Yanma]
10) The Poké Ball maker has this Pokémon.
[Shuckle]
11) These 3 Pokémon get fused by Team Rocket.
[Articuno, Moltres, Zapdos]
12) Nothing was known about the species in the past, but Bugsy learnt that this is Unown's scientific name.
[Unown]
13) This is the Pokémon species Gold and Silver find here
https://imgur.com/a/LTs0CyB /
https://i.postimg.cc/3wVRFWGQ/sd-Hq-ZHm-d.webp [Sandslash]
14) Even though Ruby already had a master, he takes this character as his grand master.
[Juan]
15) Aurora Beam is first seen used by this Pokémon.
[Dewgong]
16) Red's first defeat is against this Pokémon.
[Mew]
17) These are all the Pokémon seen in Dragon's Den that are not Dragon-type.
[Gyarados, Suicune]
18) Zangoose is this character's only permanently owned Pokémon.
[Sidney]
19) This character accidentally takes Crystal along as a stowaway, but Crystal helps out when they get in trouble with wild Pokémon.
[Lt. Surge]
20) Blaise steals these items that two Gym Leaders were protecting.
[Blue Orb, Red Orb]
21) Raikou first appears out of this location as a ray of light.
[Burned Tower]
22) Gold confuses this character for a girl.
[Bugsy]
23) This is Satoshi Yamamoto's favourite Pokémon.
[Swalot]
24) Gold states that this move allows a certain Pokémon to heal, and it also brings water to a well.
[Yawn]
25) The Gym Leaders of Hoenn use this type of Poké Ball to show they are in official duty.
[Great Ball]
26) On his way to the top of the Tin Tower, Eusine encounters a barrier. This is the item used to bypass it.
[Clear Bell]
27) During Yellow's training with Blue, these 2 Pokémon cause her problems since they were originally from other trainers.
[Graveler, Omanyte / Gravvy, Omny]
28) Exeggcute uses these 2 moves to assist with Lt. Surge's Electrode's Self-Destruct.
[Barrage, Egg Bomb]
29) Kecleon uses this move against Norman's Slaking.
[Astonish]
30) This city's merchant association tries to catch a certain Pokémon they considered a pest.
[Pewter / Pewter City]
31) Ultra Balls are implied to be tougher than Poké Balls. Lance forcefully opens his own Ultra Balls using this Pokémon.
[Aerodactyl]
32) This Pokémon remembered the weakness of one of Crystal's Pokémon for five years, and was able to disable her Poké Balls by breaking the buttons.
[Larvitar]
33) Many Houndour ambush Lt. Surge, all according to this character's plan.
[Masked Man / Pryce]
34) As Red was looking for this item below the sea, a Pokémon attacks him and breaks it.
[HM03 / HM03: Surf / Surf]
35) Erika, Misty and Brock use this Pokémon as a bridge.
[Onix]
36) "Team ROCKET" stands for this.
[Team Raid On the City, Knock Out, Evil Tusks]
37) Green's Horsea leaves an ink trail while attached to this Pokémon in order to follow it.
[Slowbro]
38) These 4 Pokémon pairs are seen by Yellow when she wakes up in the Pokémon Day Care.
[Furret, Pikachu, Skiploom, Xatu]
39) Gold and Crystal are immobilized by the two subleaders/executives of Team Rocket, who use this move to do it.
[Roar]
40) Pika creates a lava whirlpool using Surf to trap this character.
[Lance]
41) When Ruby disappears into the sea, Rara manages to convince Wally that he's still alive. This is the amount of days left until the deadline at that point.
[77 / Seventy-seven]
42) At the Vermillion Beach Monster-Wave-Riding Contest, Yellow is riding this lent Pokémon.
[Slowpoke]
43) These 2 Pokémon make up an electric fence to trap Eusine. They later flee in shame.
[Elekid, Spinarak]
44) Professor Oak is intrigued by a letter from this character, since "Who would write a letter by hand in the computer age anyway?!".
[Bruno]
45) Groudon uses Thunder against this Pokémon, paralyzing it.
[Machoke]
46) This Pokémon creates a barrier in the healing hot springs of Mt. Silver.
[Mr. Mime]
47) Gym Leaders are not all-knowing. In fact, during the Gym Leader conference in chapter 222, these Gym Leaders were in "Team Aqua's team".
[Brawly, Roxanne, Wallace]
48) Yellow rescues a Pokémon in a tree that was about to be hit by this move (and later adds it to her team).
[Fire Blast]
49) These Pokémon are the ones Steven was missing to awake Regirock, Regice, and Registeel.
[Relicanth, Wailord]
50) Yellow gets a map from Blaine in this chapter.
[PS065 / Karate Machop! / 65]
51) A Gym Leader states that this attack can't be used indoors.
[Explosion]
52) After using a certain move, this Pokémon becomes a Ghost-type and is said to be immune to physical attacks.
[Porygon]
53) Kiki uses this move to defeat a Crawdaunt after infatuating it with Cute Charm.
[Double-Edge]
54) This character owns a hourglass decorated with Sandshrew.
[Juan]
55) Riddle time by Blaine: what has only one entrance but three exits?
[Sweater / A sweater]
56) The mixture of the juice of these two berries makes an adhesive.
[Kelpsy, Pomeg / Kelpsy Berry, Pomeg Berry]
57) Order the questions using the chapters they ask about. Take the beginning of each question to solve this final one. RGB doesn't need anything, Yellow likes params, GSC ignores the 20th, and RS is a fan of Caesar (7 times). Answer with the four Pokémon, in that order.
[Rattata, Smeargle, Aggron-Mega, Darmanitan-Galar]