Defeat Brock in Set Mode using 2 or fewer Pokémon at level 14 or less.

Buy the Magikarp from the man just outside Mt. Moon's Pokemon Center.

Pick either the Helix Fossil or the Dome Fossil inside Mt. Moon.

Defeat Misty in Set Mode using 2 or fewer Pokémon at level 21 or less.

Defeat Lt. Surge in Set Mode using 3 or fewer Pokémon at level 24 or less.

Trade a Spearow for a Farfetch'd in Vermillion City.

Trade a male Nidoran for a female Nidoran on Route 5.

Trade an Abra for a Mr. Mime on Route 2.

Obtain the Old Amber at the Pewter City Museum.

Find the Eevee in Celadon City.

Defeat Erika in Set Mode using 3 or fewer Pokémon at level 29 or less.

Catch a Snorlax on Route 12 or 16.

Trade a Nidorino for a Nidorina on Route 11.

Defeat the Head of the Dojo in Saffron City.

Defeat Koga in Set Mode using 4 or fewer Pokémon at level 43 or less.

Obtain the Lapras in Silph Co. after defeating your rival.

Defeat Sabrina in Set Mode using 4 or fewer Pokémon at level 43 or less.

Defeat Blaine in Set Mode using 4 or fewer Pokémon at level 47 or less.

Defeat Giovanni in Set Mode using 5 or fewer Pokémon at level 50 or less.

Defeat the first round of the Elite Four with only one Pokémon in your party.

Trade a Golduck for a Lickitung in the gate between Route 18 and Fuschia City.

Trade a Venonat for a Tangela on Cinnabar Island.

Trade a Raichu for an Electrode on Cinnabar Island.

Defeat the second round of the Elite Four with only one Pokémon in your party.

Obtain the Egg from the old man in the Water Labyrinth.

Trade a Ponyta for a Seel on Cinnabar Island.

Trade a Poliwhirl for a Jynx in Cerulean City.

Defeat your rival in Professor Oak's Lab.

Win the optional battle against your rival on Route 22.

Defeat your rival in Cerulean City.

Defeat your rival on the S.S. Anne.

Defeat your rival in the Pokémon Tower.

Defeat your rival in Saffron City.

Defeat your rival on your way to the Pokémon League.

Stop Team Rocket in Celadon City.

Stop Team Rocket in Saffron City.

Defeat Brock and earn the Boulder Badge.

Defeat Misty and earn the Cascade Badge.

Defeat Lt. Surge and earn the Thunder Badge.

Defeat Erika and earn the Rainbow Badge.

Defeat Koga and earn the Soul Badge.

Defeat Sabrina and earn the Marsh Badge.

Defeat Blaine and earn the Volcano Badge.

Defeat Giovanni and earn the Earth Badge.

Become the League Champion.

Return stronger and become the League Champion again.

Catch a Chansey.

Catch Moltres.

Catch Zapdos.

Catch Articuno.

Catch Mewtwo.

Catch Raikou, Entei or Suicune.

Catch all 170 obtainable Pokémon.

Rescue Lostelle on Three Island.

Help Lorelei in stopping Team Rocket on Island 4.

Rescue Selphy on Island 5.

Stop Team Rocket in their warehouse on Island 5.

Complete the Single Battle challenge at the Trainer Tower.

Complete the Double Battle challenge at the Trainer Tower.

Complete the Knockout Battle challenge at the Trainer Tower.

Complete the Mixed Battle challenge at the Trainer Tower.