Articuno
Hidden Ability: Freeze Body
When a Pokémon with this Ability is hit by a move that makes contact, there is a 30% chance that the attacking Pokémon will become freezed.
>>25634616
I think to make it fair it should be 10% as freeze is a bitch, and the highest secondary chance of a regular move freezing is 10%, as opposed to burn and para (both 30% other than sacred fire and inferno/zap cannon)