Mystery of the Monkey Cage
From the Super Mario Wiki, the Mario encyclopedia
To complete this mission, the player has to climb to the top of the mountain, much like in the first mission. Instead of a Power Star at the top, the player will find an Ukkiki running around. Upon the player catching him, he will ask the player to let him go in exchange for letting him show them "something cool." Agreeing to his offer will have the Ukkiki lead the player to a small cage hovering next to the waterfall. Talking to the Ukkiki again will have him jump onto the cage, causing it to fall and crash on the piece of land below, releasing a Power Star. The player then has to jump off the cliff and collect it.
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