Foot soldiers in the Mushroom Kingdom under the direct leadership of Bowser. Though many Koopas have appeared who do not work for Bowser (or any other villain), some of whom even act as allies to Mario during his adventures. Koopa Troopas are turtle-like creatures with shells that come in many different colors. Koopas, along with Goombas are some of Mario's most common foes.

Since Bowser decided to cannabalize the Koopa race, the remaining Koopas headed underground to attempt to hide. Though they are running out of food, the crew of Gongshow:Gaiden is trying to help them out. In the rundown underground village where they hide, it appears there are around 30 or so. Their leader is a Magikoopa.