Pokemon DS Questions!!!!!!!!!?

ok so i want to play pokemon online there person who can anwsere the most questions will win

first off can i trade my pokemone from pokemon crystal up to pokemon diamond?

do i need pokemon battle revolution to be able to go online with pokemone diamond or pearl?

can i go sraight online with my ds from pokemon black or white?

is there a game like pokemone battle revolution for the wii coming out for pokemone black and white?

which pokemone should i buy now becuz me and my friend decided that we'd dominate the online community so im not sure which pokemone game to buy, i only have yellow and crystal

he bought soul silver becuz its a remake can he transfer his soulsilver pokemon to diamond or pearL?

soul silver is the best game in my opinion and im going to buy it to if im able to transfer my pokemone to pearl or diamond

if theres anything else you wud like to add please do so thank you