Defeat your Rival at Oak's Lab

Defeat Falkner

Defeat your Rival on Route 102

Defeat Bugsy

Defeat Team Rocket at the Aquarium

Defeat Whitney

Defeat your Rival inside the Slowpoke Well

Defeat Morty

Defeat Team Rocket's captain aboard their ship

Defeat Jasmine

Defeat Pryce

Defeat your Rival at the gate to Stand City

Defeat Okera

Destroy the Signal Machine at the Underground Rocket Base

Defeat Giovanni at the Radio Tower

Defeat a trainer at the Trainer House in Kanto

Defeat Red

Defeat your rival at Mount Fuji

Defeat Lance for the first time and enter the Hall Of Fame

Defeat Lance for the first time having only Nyanya in your party and enter the Hall Of Fame

Defeat Bruno

Defeat Blue

Defeat your rival at the Silver Forest

Catch all 253 Pokemon

Beat all Gym Leader Rematches in 1 session [No Pokecenter]

Beat all Gym Leader Rematches in 1 session using only one Pokemon [No Pokecenter]

Defeat Lance in a rematch and enter the Hall Of Fame

Defeat Lance in a rematch having only Nyanya in your party