In a dog eat dog... well, Pokemon eat Pokemon, world, it takes a lot to be top dog. Whether wild or your Pokemon, he will often times be aggressive. Being both Dark and Fire type lends itself to a powerful ally, or a deadly foe. Of course, this Houndoom's interests lie in other areas than just battling. More keen on giving you a bone and filling you up, though blowing off some steam in the occasional battle is something he will do. He's not exactly picky, the main concern is he's the one doing the stuffing as opposed to getting stuffed. Trainers and other Pokemon are preferred, but he can easily be a "regular" hellhound in a modern or non-Pokemon setting. Houndoom, Hades or whatever Hellish nickname fits will be the typical name used.