The attack would be a slow dash forward, and would bounce you off whatever you hit.

The 1st ability would be a quick dash forward that would cause an explosion.

The 2nd ability would be armor, which would have its own health separate from yours.

What would the 3rd ability be? I want wall-nut to be similar to sunflower and peashooter, so the 3rd ability should stick him in the ground, restricting his movement, but let him deal a lot of damage.

Also he would be the same size.