Background swap, texture swap and edit, vertex paint, all that [censored]. A bit of model editing went into it as well. This is actually my first time using vertex paint for my own purposes, and I must say, it has good results.
Credit to Calamitas for the use of some textures.
Have fun.
Hey, click that button down there, and I'll fly you up to that castle.
Thanks, I still have to release rouge over sonic (heroes and normal outfits) and over finish over zss using generations model in case you're interested.