Obtain a free sample courtesy of the Viridian City Pokemon Mart.
Obtain a map of the region.
Obtain the Pokedex.
Obtain 5 Poke Balls from Prof. Oak.
Find every Item and defeat every Trainer in Viridian Forest.
Find every Item and defeat every Trainer in Mt. Moon.
Go from one entrance of Viridian Forest to the other without initiating any wild encounters. (One session, no Repel or Cut)
Obtain the Itemfinder from the Aide on Route 11.
Obtain HM05 Flash from the Aide on Route 2.
Collect all optional Items and defeat all optional Trainers on the S.S. Anne.
Rub the Captain's Back on the S.S. Anne and obtain HM01 Cut.
Land a Critical Hit 5 turns in a row in a single battle.
Land 5 One-Hit KO moves in a row in a single battle.
Cut the grass.
Obtain HM02 Fly from the secret house on Route 16.
Find all the free coins in the Celadon City Game Corner.
Obtain the Silph Scope from the Rocket Hideout.
Find every Item and defeat every Trainer in the Rocket Hideout.
Gift the Ghost of Lavender Tower a Poke Doll to calm it without using the Silph Scope.
Find every Item and defeat every Trainer in the Pokemon Tower.
Survive 20 turns in a battle without switching out or having either Pokemon be harmed. (Must be at Max HP, status is fine)
Obtain all 3 Fishing Rods.
Obtain an Exp. All from the Aide in Fuchsia City.
Collect all optional Items in the Safari Zone in a single Safari Hunt. (One session)
Obtain HM03 Surf from the Safari Zone.
Catch 10 Pokemon in a single Safari Hunt. (One session)
Obtain HM04 Strength from the Safari Zone Warden in Fuchsia City.
Obtain the Bicycle from the Bike Shop in Cerulean City.
Obtain the Master Ball from the President of Silph Co.
Find every Item, defeat every Trainer, and open all Doors in Silph Co.
Claim all 6 Gift Pokemon. (Including Revived Fossils and Magikarp)
Complete all 9 in-game trades.
Read all Journals in the Cinnabar Mansion without leaving. (One Session)
Complete all of the Quizzes in the Cinnabar Island Gym without leaving the building or fighting any trainers.
Navigate through the Fuchsia City Gym without bonking. (Start from Gym Entrance)
Defeat Brock on Set Mode without using items in battle. (Level 14 Cap)
Defeat Misty on Set Mode without using items in battle. (Level 21 Cap)
Defeat Lt. Surge on Set Mode without using items in battle. (Level 24 Cap)
Defeat Erika on Set Mode without using items in battle. (Level 29 Cap)
Defeat Koga on Set Mode without using items in battle. (Level 43 Cap)
Defeat Sabrina on Set Mode without using items in battle. (Level 43 Cap)
Navigate through the Saffron City Gym using the fewest amount of warps. (Start from Gym Entrance)
Defeat Blaine on Set Mode without using items in battle. (Level 47 Cap)
Grab the only Item Ball in the game that is inside of a Gym.
Navigate through the Viridian City Gym without using the Spin Tiles. (Start from Gym Entrance)
Defeat Giovanni on Set Mode without using items in battle. (Level 50 Cap)
Reach the Rival in Silph Co. without defeating more than 1 trainer.
Be told about a legendary Pokemon that sleeps a lot.
Glance at a mysterious bird in the distance using the binoculars.
Find every Item and defeat every Trainer in Victory Road.
Catch all of your version's exclusive Pokemon.
Defeat the Pokemon League in one session using a full party of version exclusive Pokemon.
Defeat the Pokemon League without having any Pokemon faint. (Level 60 Cap, One Session starting from entering door)
Defeat the Pokemon League using Set Mode without using items in Battle. (Level 50 Cap, One Session starting from entering door)
Use Metronome to go out with a bang.
As Ditto, use Transform on an Enemy Ditto.
Find and clear all of the stationary Pokemon in Kanto.
Catch every Normal Wild Encounter Pokemon in Cerulean Cave without leaving the area. (One Session, No Master Ball)
Catch Mewtwo without using the Master Ball.
Catch Chansey, Scyther or Pinsir, Tauros and Kanghaskan in the Safari Zone in one session. (Multiple Safari Hunts are fine)
Win a Bar at the Celadon City Game Corner.
Win a Jackpot at the Celadon City Game Corner.
Win 3000 Credits from Slots without leaving the Game Corner.
Have 9999 Coins at once.
Buy all of the Game Corner Pokemon in one session.
Max out a Pokemon's Stat Experience.
Be cured of being Frozen in battle without using an item in that battle.
Find all 50 not missable TMs and HMs on the overworld.
Buy 1 of every TM you can buy from the Department Store and the Game Corner in one session.
Find all not missable items (including hidden items) on the overworld.
Defeat all not missable Trainers in the Kanto region.
Prevent your Pokemon from evolving.
Generate over $2000 in a single fight using Pay Day.
Earn the Boulder Badge in Pewter City.
Earn the Cascade Badge in Cerulean City.
Earn the Thunder Badge in Vermillion City.
Earn the Rainbow Badge in Celadon City.
Earn the Soul Badge in Fuchsia City.
Earn the Marsh Badge in Saffron City.
Earn the Volcano Badge at Cinnabar Island.
Earn the Earth Badge in Viridian City.
Assemble a full team of Pokemon.
Beat the Elite Four and the Champion of the Pokemon League.
Get the Pokemon in Slot 1 from Level 49 to Level 50.
Get all the Pokemon in your party to Lvl 50.
Get the Pokemon in Slot 1 from Level 99 to Level 100.
Choose a Fossil at the end of Mt. Moon.
Claim your prize from the Saffron City Dojo.
Save Mr. Fuji and obtain the Poke Flute.
Use the Pokeflute to awaken and catch Snorlax.
Catch the three legendary birds.
Catch the fabled Mewtwo.
Beat the Pokemon League with only one Pokemon in your party. (One Session start from entering door, No Mew or Mewtwo)
Catch all 124 Pokemon possible in either game without outside trading.