The only Pokemon that you can fuse is Kyurem with either Reshiram or Zekrom however you will need to use the DNA Splicers item in order to activate the fusion.
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No. You could fuse Pokemon together in your imagination, but none of the games will allow you to fuse Pokemon together. It's impossible.
you cant...
I doubt it
Where can you go to play Pokemon online?
you get the ss.anne pass from bill when you de-fuse him form the Pokemon he fused him self with when he comes out talk to him and he will give you it then go to whatever city with the electric gym in it its like vermillion or something like that then you go to the boat and you go in to it and you will have to battle your rivle to get HM 1 wich is cut oh and buy the way YELLOW IN SO MUTH BETTER!!!!!!!!!!!!!!