No. Sonic R is not on the gamecube version or any version. it is only in Sonic Gems Collection.
no
There are no costumes in Sonic Generations.
sonic generations,or both!
No
No, Sonic The Hedgehog 4 was released after the GameCube was discontinued, so it is not available for that system.
yes
Sonic Generations happened in 2011.
yes
You can`t.
Yes there is a sonic adventure 2 battle for the gamecube. I know because I have it~
Yes, she is going to appear in Sonic generations.