- "A platform from Cossack Stage 3 in MM4. Unless set otherwise, it stays still until touched, at which it will then sink when you're standing on it and rise when you're not."
- ―Note in Cossack Platform's code, Megamix Engine
The Cossack Platform is a gimmick from Mega Man 4, found in the third stage of Dr. Cossack's Citadel. It is a floating platform that is weighed down by riders, and rises when its load is lessened.
Cossack Platforms were first made available in the devkit for the original Make a Good Mega Man Level, and were used in the entries Sunset Siege, Hard to See Land, and Spiky Meltdown, as well as the Wily stage Flashback Database.
Cossack Platforms returned in Make a Good Mega Man Level 2, and were used in the entries Forgotten Fortress and Escape Sequence. They also saw use in the Make a Good Mega Man Level: Episode Zero level Explosive Freefall.
Cossack Platforms appear from thin air and remain still up until Mega Man jumps on one. When he does, the platform will constantly move down slowly as long as he stands on it, and rise upwards at a faster rate when he jumps off of it.
The speed at which a Cossack Platform descends and ascends can be altered by setting "standSpeed" and "airSpeed" (respectively) in creation code. Notably, this means it is possible to create Cossack Platforms that only decend or ascend, or even remain completely still no matter what.
- In the Make a Good Mega Man Level devkit, Cossack Platforms were known as "sinking_platform".