Alex Onsager created Pokemon Fusion -- a website which lets you splice together the sprites of two different Pokémon, allowing you to create a fresh, possibly horrifying combination -- a few years ago. The website isn't new. This past weekend, however, Tumblr artists took it upon themselves to create artistic renditions of their favourite fusions. The results are fantastic.
Here's a small selection of the art, although you can find a ton of Pokémon fusions under the "Pokemon Fusion" or "Pokemon Fusions" tag on Tumblr. The one above, if you couldn't tell, is Psyduck + Charizard by crybringer. Original sprite fusion here.