I'd have to go with Arcanine line. =) Growlithe is adorable; if I ever were to have a puppy in real life, I'd love it if it looked something like this. As for Arcanine, well, it's big, huge, powerful, and it's feared by other Pokémon, too. If it didn't, it definitely wouldn't have had Intimidate ability, haha. It could also be pretty helpful while battling competitively; you just need to be a little thoughtful while utilizing, and it could sweep your opponent away easily.