Dante v.s. Sora
For some reason why, Heartless have been appearing in massive numbers, and Dante is getting ****in' sick of it. So he decides to go find the source of the problem, his search leads him to Hollow Bastion where he finds a kid weilding a fancy blade. Sora sees Dante walking from the last of the darkness. Misinterpreting that Dante is a friend, Sora charges at him.
Sora may use all of his forms, he can use his magic, and he can use all of his equipment(weapons, potions, etc.)
Dante can use Devil Trigger and all of his equipment.