http://www.gamespot.com/wii/strategy/pokemonbattlerevolution/story.html?sid=6167037
Most people suspect this to be Empelte...but judging on Napoleon being short, I'd say maybe Pottaishi?
We saw a flaming unicorn shoot fire from its mouth; Empoleon, a penguin, rode a large wave that did damage to two characters at once; and there were all sorts of colorful casting attacks. As you'd expect, when a Pokémon loses all of its health, it faints, and it's back to the pokéball for it.
Most people suspect this to be Empelte...but judging on Napoleon being short, I'd say maybe Pottaishi?