Using models from Heroes, Adventure, and all that seems cool, but it's copyrighted material. I can't see SRB2 using those anytime soon, unless my knowledge of law needs a bit of brushing up.
Though, making an entirely new model works too. Say, if Jackel still has the Knuckles model with him, he could take newer and better sprite caps.
Though, making an entirely new model works too. Say, if Jackel still has the Knuckles model with him, he could take newer and better sprite caps.