Instructions
Follow the natural storyline of "Pokémon SoulSilver," catching Pokémon and defeating the various gym masters in each town. You will need to earn all 16 gym badges from the Johto and Kanto regions.
Head to Mt. Silver. You can find by traveling north on Route 28 from Kanto.
Speak with Red at the top of the mountain. Red will challenge you to battle.
Defeat Red. His lineup includes Pikachu (88), Venusaur (84), Lapras (80), Snorlax (82), Blastoise (84) and Charizard (84).
Speak with Professor Oak after the battle. He will allow you to choose between the Kanto starters.