For those who don't know, Pokemon Fusions are a craze over at reddit at the moment. They are based upon this, a simple program which allows you to select two pokemon and merge them. It then takes the face and colour of the first pokemon and applies it to the second. Lot of people have then taken these fusions and done proper drawings of them, some very good.
Talking of kings, I found another contender on Zombiedogdoes tumblr. I can't make up my mind if I like it or not. It looks more like a Digimon than a Pokemon truth be told.
Depends if you like 'realistic' style Pokemon. I really do so I like them. Not all are too my taste but Cuking is probably my favourite in this thread.
Edit:
Have a nice fusion I found at thaumatropes for your trouble.