Switch Star in the Basement
From the Super Mario Wiki, the Mario encyclopedia
In order to complete this mission, the player must have Wario unlocked. The player has to make their way to the basement of the mansion by using the elevator in the shed. Once they are in the hall surrounding the merry-go-round, Wario has to break the Black Brick covering the Star Switch. Once it is stepped on, the Power Star will appear in the Star Sphere on the opposite side of the room. The player has to rush to collect the Power Star before it disappears. Because of Wario's low running speed, the mission can be made easier if the player uncovers the switch and then collects another cap to turn into a different character.
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