|Music||The Room Underground|
The players must team up to win. The player gets a key while everyone else the key like a team. If one of the five Spike Koopas gets the key, the game ends with a "Miss". If the player with the key reaches to the key lock, all the players win, earning ten coins.
In the Mini-Game Island, however, the results are quite different. The player must be the one to open the door in order to clear this minigame. If a Spike Koopa gets the key or if one of the three CPU characters open the door first, the player loses his/her life.
- – Move
- – Jump
- – Throw Key
In-game Text Edit
- Game Rules – "Open the door without letting the Spike Koopas get the key. If they do, the game ends. Press B Button to pass the key."
- Game Rules (Mini-Game Island) – "Keep the key away from the Spike Koopas and open the door. Clear the game by opening the door."
- Advice – "It gets easier to pass to your teammates as Spike Koopas approach."