Dialga because he can fight over and over again.
Dialga. A couple reasons: -Typing. Dialga is Dragon/Steel, Palkia is Dragon/Water. P's weak to Dragon-type moves, still, but D's resistances are astounding, and Water is included. -Moves. D's...
it came out already
it will be shown on cartoon network on feb. 24 2008 and the title is Pokemon The Rise of Darkrai
sorry but i am not sure but I think it will be in late 2008 to mid. 2009. I've seen Japanese trailers and it looks really good!