How do you get to red on soul silver?

First you need to awaken Snorlax. Go in the Game Corner, press the switch behind the poster. Defeat the boss Giovanni, he will give you Silph Scope. Go back to Lavender, go in the tower, at the top, you will see Fuij, go talk to him, he will take you to his house and give you a Poké Flute. Now you need to have a bike. Go talk to someone in the Vermilion city, he will give you a bike voucher, exchange it for a real bike at the shop in Cerulean City. You are now ready to go on the Cycling Road which will take you to Fuchsia City. In the gym, you just have to find your way in the labyrinth and defeat Koga. He only has Poison Pokémon.