you can't get to any of the Sevi island in Pokemon Heartgold and soul silver
the top left
i have no clue
The fourth gym leader in Pokemon Soul Silver is in Ecruteak City.
The Cinnabar Island
cindber island
it's impossible
Seafoam island is in the Kanto region in Heartgold and Soulsilver.
East of Cinninbar Island and southeast of Fucshia City.
You can't. New Moon island is in Sinnoh.
I believe the Top Right island.
The fourth gym leader hates ghost type pokemon. ex:Gastly
You can find it on Cinnabar Island.