|Level code||Level x-12|
|Game||Mario vs. Donkey Kong|
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The player first has to move right while dodging lasers, using a Bob-omb as a moving platform if needed. Jumping onto the platform above, the player has to press a Direction Switch and then climb up into the area above. Using the Springboard, the player needs to toss three Bob-ombs onto the conveyor belt above to open the path below on the right. The player then has to climb down a ladder and use a Bob-omb to break the Bob-omb Blocks next to the locked door, and then climb back up and wait for a Bob-omb to appear, and then quickly jump across some ropes to reach the Key. If the player moved fast enough, the Bob-omb will be below the player and they can drop onto it to ride it across the spikes and carry the Key to the locked door.
- Red: Near the player's starting position, under some Bob-omb Blocks.
- Yellow: To the left of the small area with the Springboard and two Bob-omb dispensers. The player has to toss Bob-ombs onto the above conveyor as it is moving left to open area blocked by Bob-omb Blocks.
- Blue: Below the Key's starting position.