Envy
Crazy Woodwind Lady
I think that GC Island is bigger than Nds and Wii versions but now, that island(3DS)has been "remaked", maybe is bigger than GC version.
There was never an island in WW or CF.
Anyway, I can't claim to know what purpose this island will have either. The island in the GCN version wasn't much of anything special. It had one villager (which I don't even remember what he/she could even do), their house, a house with four Hawaiian style shirts, and palm trees. It was also eternally summer, which sounds nice, but when you think about it probably isn't that good of a thing. Waiting for summer to get all of those bugs and stuff is better.
I have no idea what they'd do with it here.