Tunnel of Lava!
A Mechakoopa eats a key, then runs off into a door. Then, a large group of Mechakoopas emerges from that area.
The player must jump on Mechakoopas and try to find the one that swallowed the Key. However, the Mechakoopas constantly rotate in a circle and move in and out. Occasionally, their eyes will glow, and they will breathe fire. Touching the flame or a Mechakoopa will stun the player temporarily. If the player successfully finds the correct Mechakoopa within 30 seconds, they avoid Bowser's penalty.
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