Square Machine

Square Machine is a room-like boss, which appears at the end of Cossack Stage 2 in Mega Man 4. It slides like the sliding slot game in Super Mario 3 for NES (and it does this at various speeds). At its slowest speed is when it will merge together and Mega Man will need to get inside it to attack it. When it's fully formed, its weak spot, the large flashing red light, will appear. Its weakness is Dust Crusher, although you can use the Wire Adaptor. Mega Man will have to ride the platforms and dodge the shots as he attacks. It is sort of a bigger and 3-part Picopico-Master.