For a very dark Pokemon style pixel work I give a very dark Pokedex entry:
Mouthhead: The Cannibal Pokemon. Ground Fighting. HT 7'3''. WT 700lbs. Pokedex entry: "They can shovel entire forests into their mouths before filling their stomachs. If two MOUTHHEADS meet, the pair will try to devour each other whole."
While Pokemon is what I thought of first, I must say on second thought it makes me think of sword and sorcery games for the Super Nintendo