Kooper is the second friend/partner Mario comes across in the game. He is a bit shy as a turtle but he is stubborn with his wishes. Mario met him because he had to chase down his shell which a Fuzzy had stolen.
In the field=Edit
Kooper uses attacks that ignore spikes and fire, so he can hit most enemies, unless they are airborne. He also knows an all-party attack, dizzy-effect attack, and flame attack.