Where Is Steven In Pokemon Soul Silver?

He is a guy with blue hair .you see him after you the the doll for that copy cat girl and he tells you about latios and he is ever where  and it is like the 3 ever dogs but he is in both joht .kanto and
thats it :)

If you go to the lake of rage and go all the way to the end of the land and surf up all the as possible the surf to the left.after that you surf all the way down.there will be a piece of land with a house.walk inside of the house and steven is next  to the door and if you talk to him he will say "do you have a red garidos.if you do he will trade you a level 50 latios

hope this help

He's just out side of the elite four gate in the kanto region