No, they're just ultra rare versions of already existing pokemon. Normal. Btw, what the hell is a "dark" pokemon? Normal Pokemon with evil intent?
Bug Dark Dragon Electric Fighting Fire Flying Ghost Grass Ground Ice Normal Poison Psychic Rock Steel Water ??? What do I win?
Yeah I know, but are they only called that because of their color? Like insect pokemon are insects and flying pokemon are usually birds...whats "dark?" Badness? They seem exactly like normal, lol.
They're usually evil looking Pokémon or ones that have to do with the night. Hell, the Japanese name is Aku Taipu, Evil Type.