Mecha-Koopas are, as the name implies, mechanic Koopas, with a wind-up key on their back. They belong to the Super Mario series, and the Koopa Troop. They attack by chasing the player, and, in the manner of Bowser, by spiting fire. If Mario jumps on a Mecha-Koopa, he will be paralysed, and so become carriable. He will explode after a short time, like a Bob-omb.
Mecha-Koopas make an appearance on the Koopalings' team in New Super Mario Baseball.
Mecha-Koopas make thier first appearance in a Paper Mario game. They appear as Bowser's minions. HP:4 Attack:1 Defense:0