Seesaw (Wario: Master of Disguise)
From the Super Mario Wiki
A seesaw is an object from Wario: Master of Disguise. They are only found in the Ancient Waterworks. When Arty Wario stands on one end, then draws a block and lets it fall on the other end, it propels him upward. The farther the block falls before landing on the seesaw, the higher Wario is launched. They appear most prominently during the boss battle against Ka-Bloom!, where they are necessary to catch Ka-Bloom! when it flies away, since Wario does not have the Wicked Wario disguise at the time this fight occurs.