A lot of strong things are cute like Togekiss, Clefable, Chansey, Dragonite, Whimsicott, Goodra, Snorlax, Ampharos, Mega Altaria, Sylveon, Florges, Appletun, most of the mythical Pokemon. Indeed, you can't always judge a book by it's cover. As Lady Macbeth said, "Look like the innocent flower, but be the serpent under it."