koopa troopa

Turtle-like enemies from the Mario metaseries.

Koopa Troopas are turtle-like humanoids with shells that come in many different colors. Koopas, along with Goombas, are some of Mario's most persistent foes. Flying variants are usually called Koopa Paratroopas.

They're common enemies in the Mario series, usually displayed as foot soldiers of the Koopa Troop, under the direct leadership of Bowser. Since Super Mario 64, however, 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.

In Japan, the Troopas are referred to as "Nokonoko".