Instructions
Complete the Johto and Kanto regions of the game by collecting all 16 Gym Badges and defeating the Pokémon Leagues in both areas.
Go to Mount Silver in the far west of the region and take on Red.
Beat Red's six Pokémon to win the battle. He has a level 88 Pikachu, a level 80 Lapras, a level 82 Snorlax, a level 84 Venusaur, a level 84 Charizard and a level 84 Blastoise.
Talk to Red to get the HM08 (Rock Climb).
Head east on Route 22 to Veridian City and then south on Route 1 to Pallet Town.
Go to Professor Oak's lab and talk to him; he will offer you your choice of starter Pokémon.