I used the tutorial for carving by jammjenks in the forums (I had to tweak it a bit to make it look right, but the tutorial was very helpful). Thanks goes out to Anne1017 & Cubbycakes for inspiration. Also thanks to Royal Bakery on FB for the tutorial on the double color "burst" at the top of the cake. Sonic is RKT covered in fondant. All other details are fondant or gumpaste.