Kabatoncue

Hippoplatter is a mini-boss enemy of Mega Man 4. There are two of them in Ring Man's stage. Hippoplatter shoots homing missiles at you, and you need to shoot the rings to make the platform come down to you, but the rings quickly regenerate. For one of the two, use Flash Stopper to stop the missiles and buy some breathing room; for the other, use Rain Flush to strike the hippo AND the missiles at the same time. From Mega Man IV, two of them show up in Stone Man's level alone.