More like an OP ability in the form of Fluffy. It takes half damage from any and all moves that involve physical contact, at the cost of having a Super Effective weakness to Fire moves. It has decent bulk by itself, which gets blown through the roof with Fluffy, meaning it can survive Super Effective moves from dedicated physical attackers while hitting back just as hard. Add it with strong moves like Hammer Arm, Return, and stuff like Bulk Up, it's really something to fear. Truly, the mightiest of glaciers.

Beware Bewear.

>Mfw The Bear turns out to be unstoppable