Kamegoro Maker

Kamegoro Maker (カメゴローメーカー) is the boss of the first Wily stage in Mega Man 3, a invincible machine that moves in a rail. It releases turtle robots called Kamegoros in the water and controls them. Enough of the Kamegoros must be destroyed to cause the Kamegoro Maker to self destruct. As for the Kamegoros, if one is left alone long enough, it will actually shed its shell, turning it into an explosive projectile and causing itself to swim faster. The Kamegoros where originally created to verify the quality of water.

Kamegoros also appear as enemies in the Mega Man 3 handheld game, where they are called "Turtles".

Other media
Kamegoro Maker and the Kamegoros appear in episode 32 from Captain N: The Game Master as a trap in Wily's castle. The Kamegoros attack with powerful bites and are called "robot turtles" by Wily, and Kamegoro Maker is a green retractable tube in the wall and releases three Kamegoros, which are avoided by Mega Man by throwing the Shadow Blade in the buttons of the Kamegoro Maker, making it suck the water and the Kamegoros.

Trivia

 * Kame is Japanese for turtle.