I have two new abilities. Well I lied, its more like four.
Waterproof (given to certain ground, rock, and fire types)
Cannot be attacked with physical water moves.
Fireproof (given to bug, grass and ice types)
Cannot be attacked with physical fire moves.
Shockproof (given to flying and water types)
Cannot be attacked with physical electric moves.
Now these abilities aren't for common pokemon. I'll use Rhydon as an example. Rhydon with the Waterproof Ability can only be affected by Ground, Ice and Fighting moves, no longer vulnerable to Water moves. Same for Fireproof and Waterproof. Butterfree with Fireproof will only be affected by Flying, Ice and Electric moves.