Pokémon TCG: 2-pack blister pack, Raikou

One (1) 2-pack blister pack featuring Raikou. 

what the heck is Raikou anyway? Is he a dog? Is he a tiger? I don’t seem to be able to get a straight answer on this. And don’t tell me he’s a pokemon. Houndoom is a pokemon but it’s obviously a dog. Just like Litten is obviously a cat.