Yes
dungeon leader can be any Pokemon you recruit. you will be able to change leading Pokemon after you graduate .
he has to join u then complete the game and change to be him
You can't.
After you beat the game, you will have the power to change the leader at Chimecho's Assembly. You can not change the leader in a dungeon, though.
You cannot have your playable character be a Bellsprout in Pokemon Mystery Dungeon Explorers of Sky. You can, after completing the main plot, recruit a Bellsprout and change it to party leader which effectively allows you to play as a Bellsprout, just only in missions.
Yes. I just looked it up and the release date for the European's ( I say this because within a few months after their release it will probably be released in the States) Pokemon Mystery Dungeon Explorers Of The Sky is *viable to change* around November/December 2009. its coming in October 12 2009 to the US Answer: It's already released.(I own Pokemon mystery dungeon explorers of sky)
yes
Talk to one of the Shaymin in the village. At the top-right, I believe. It'll give you a Gracidea, which changes Shaymin's forme when used in a dungeon.
you cant
no
Go to shaymin village and talk to the shaymin near the fence, near The kangaskhan rock