Sorry to harp on about it, but I don't quite understand how the original artist could be upset about "his" images being used without permission. I don't know the specifics, but it's likely that the ownership of the image belongs to the copyright holder/game company (in these cases, Sonic belongs to Sega). The artist doesn't get to "own" anything, and has surrendered his rights in regards to profits from bootleg merchandise of "their" images when they don't "own" them. In fact, selling the sketches and original art is probably just as copyright infringey as the bootlegged merchandise. Awesome images by the way.