At the top of Mt.Silver, but he is known as Red.
u cant find him but u can find red in mt silver
If you mean how to consider yourself as beaten the kanto region in pokemon soulsilver, then you should find zapdos,moltres, and articuno. You should also beat Red (Ash Ketchum). Once you do that, you can catch Mewtwo.
in lake rage o something like that over by blackthorn city
You can't. It must be transferred from either red, blue, or yellow. HeartGold And SoulSilver too
You will find Red at Mt. Silver.
You will find Red at the top of Mt. Silver.
You can find Red in Mt. Silver.
At the top of Mt.Silver, but he is known as Red.
In The lake of Rage in Soulsilver/Heartgold
u cant find him but u can find red in mt silver
in Johto, Safron after you defeat red!
you can trade from red to emerald to diamond the to soulsilver
He is at the top of Mt. Silver. Bring repels and your strongest team.
After you defeat both champions you can go to mt silver go there and you will find him.
In Heartgold and Soulsilver, Red is Ash Ketchum(also you can find him on the top of Mt. Silver. He has Pikachu, Charizard, Blastoise, Venusaur, Laprus, and (I am not sure on the last one, but I think it is either Gyrados or Dragonite). It is Snorlax.
If you mean how to consider yourself as beaten the kanto region in pokemon soulsilver, then you should find zapdos,moltres, and articuno. You should also beat Red (Ash Ketchum). Once you do that, you can catch Mewtwo.