Use the Invisible PC
Why would you crash the game?
Enter the Hall of Fame with 1 minute or less on the clock
Level the Pokemon in slot 1 from 1 to 100 in one battle
Stockpile 255 Rare Candies in your 6th bag slot
Turn Pallet Town into Glitch City
Defeat Professor Oak while he has the 3rd starter
Defeat Brock only using a Rattata
Defeat Misty only using a Rattata
Defeat Lt. Surge only using a Rattata
Defeat Erika only using a Rattata
Defeat Koga only using a Rattata
Defeat Sabrina only using a Rattata
Defeat Blaine only using a Rattata
Defeat Giovanni only using a Rattata
Enter the Hall of Fame with only a Rattata in your party
Catch all 151 Pokemon. Yes ALL of them.