Dreadnought's Garbage Dump
From the Super Mario Wiki, the Mario encyclopedia
On the underside of the UFO the player starts on is a Warp Pipe that will take the player to a platform with a Gearmo and piles of trash. Talking to the Gearmo and accepting his task will begin the challenge of destroying all the garbage piles with Bob-ombs within a time limit of thirty seconds. Completing the challenge will have the Gearmo reward the player with the Power Star.
The Coin Generators on the ground serve as a hint for where the Bob-ombs should be thrown.
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