Usefulness in battle: I think Lugia, but I really love that pokemon ^-^ I got Lugia in my NDS game thanks to cheats lol, and gived it the best moves. So I guess that's why Lugia is so useful to me in battles. But I only use her in the game, not when I am battling with other players.
Appearance: Vulpix, Evee, Tokepi and Pikachu. I really love how they look, and they are so adorable! And I love how you can evolve Evee in different forms.