The Cossack Catcher is a machine piloted by Dr. Cossack in Mega Man 4 and is the boss of the final section of
Cossack's citadel. It resembles a large UFO prize catcher commonly found in arcades. When Dr. Cossack fights Mega Man, he fires on him with the two cannons on the Catcher's lower section, or tries to catch him with the claw if Mega Man is directly underneath him. The Cossack Catcher is vulnerable to the Dust Crusher weapon gained from Dust Man. Mega Man does not destroy this machine as the boss battle ends when its health bar is down to two points, at which point Dr. Cossack jumps out of the machine and Proto Man appears with the doctor's daughter Kalinka.