Koopa Arena is an Nintendo 3DS eShop downloadble game featuring the Mario enemies (speciffically; Koopa Troopa, Goomba, Chain Chomp, Shy Guy, Nabbit and Hammer Bro) in a third-person shooter game. The game plays similarly such as Team Fortress '2.
Koopa Troopa - The Jack of All-Stats
Koopa Troopa is the "leader" of the troops. He is the jack of all stats, without any advantages or disavantages. His special ability is the Koopa Shell, that gives him a defense boost.