There's no way to change your appearance on Pokemon White.
There is no way to get a gothitelle in pokemon white except trading.
give it a cassette the same way arceus gets a plate. Water is the best is way every1 says.
Vullaby is not featured in Pokemon White, only Pokemon Black. The only way to obtain it in White is to trade it from Pokemon Black.
Tornadus cannot be caught in Pokemon white. He can only be caught in Pokemon Black, in the same way Thundurus is caught in Pokemon White.
Dye your hair
The only way to get palkia in Pokemon white is to trade from other games
you cant. the only way to get there is if your friend has pokemon white and you use entralink.
Pokemon from white are WAY better than pokemon from emerald.
no
You can't change the way you look to others in Pokemon Diamond. The avatar that is chosen how you look to others is completely by random, and there is no way to change it.
The only way to get shaymin is to do the event in pokemon Platinum/Pearl/Diamond and to transfer it to pokemon black/white
there are no other regions in Pokemon black or white.