Mine has the ability Unaware. It knows:
Super Fang: Halves opponents health.
Amnesia: Increases Sp. Def. Bibarel has low Sp. Def.
Return: Bibarel was one of my first Pokemon, so it is really happy. High power, STAB, high accuracy.
Waterfall: Good power, high accuracy, decent chance to cause flinching, STAB.