From the Super Mario Wiki
Mega Mechakoopa is a larger variant of a Mechakoopa that appears as a miniboss in Mario Party 10. The Mega Mechakoopa one of the game's mid-bosses. In its boss minigame Mega Mechakoopa's Swing & Stomp, players must ride up elevators and swing on suspensions hanging from the ceiling to jump on the Mega Mechakoopa's head and deal damage. As its health dwindles, the Mega Mechakoopa will begin moving more erratically and breathing fire to try and catch players off-guard.