Web developer and Product Guy Alex Onsager made a website that allows you to fuse Pokemon together to make new Pokemon. As of right now there are about 121 different compatible Pokemon, putting the potential combinations into the thousands. The app has put a flame to the collective ass of the Pokemon fan art community, and the results have been amazing. Path, by Teenage Pokemon character designer Astrobats, is a personal favorite.
Alex collected a bunch of his favorite fusions here, but there are a whole heck of a lot more on Tumblr. It seems like combining Cubone, Zubat, Paras, and Magemite with anything is guaranteed creepy fun. Why not make some fusions and report back in the comments?