He's in the seafoam islands.
the 15th gym leader in soul sliver is blaine and he uses only fire type pokemon
The fourth gym leader in Pokemon Soul Silver is in Ecruteak City.
Ghost Pokemon.
you dont
Hi
in viridian city
Cinawood City.
Face the elite four.
in his gym
don
The Kanto gym leaders come in no particular order, but Blaine is typically the last gym leader fought, and also the second to last gym leader appearing on the Trainer Card.
the 16th gym leader is:Trainer Blue