Don't be taken in by this Pokémon's cute face—it's very dangerous. Mawile fools the foe into letting down its guard, then chomps down with its massive jaws. The steel jaws are really horns that have been transformed.
Mawile's huge jaws are actually steel horns that have been transformed. Its docile-looking face serves to lull its foe into letting down its guard. When the foe least expects it, Mawile chomps it with its gaping jaws.