Originally Posted by pokemonspriter
I'll do Darkeon.
There's already a dark type eeveelution *points to Umbreon* Unless you mean the legendary, Darkon.
And, may I present to you your Crabbo!
Dex Entry: Crabbo, the Water Crab Pokémon. Its left claw has yet to grow, whereas it's right claw is bigger than it's body, making it stay the same size throughout the evolution process.
I know the Dex Entry wasn't needed, but meh.