Chests in the Current
From the Super Mario Wiki
To get the Power Star for this level, the player has to open up the chests at the bottom of the first area in the correct order. Opening up the wrong one will result in the character getting electrocuted and the puzzle will reset, and every time the correct one is opened, an air bubble will come out. The order of the chests are as follows:
Once all the chests have been opened in the correct order, the Power Star will appear to the left of the tunnel's entrance.
In the DS version, the third chest is removed.
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