Koopa Troopa is a fictional character from the Super Mario video game series created by Nintendo. They are turtle-like creatures that often serve as enemies to Mario and his friends. Koopa Troopas come in various colors, with green and red being the most common. They can walk, swim, and sometimes fly, depending on the game. In many games, players can defeat Koopa Troopas by jumping on them, causing them to retreat into their shells. Players can then kick the shells to defeat other enemies or break obstacles. Koopa Troopas are iconic characters and have appeared in numerous Mario games since their debut in 1985.