From the Super Mario Wiki
Like in Wingo's Watchtower, the level takes place in a dark and stormy tower where Wingo will constantly produce gusts of wind in attempts to blow Captain Toad away. The boss battle is also the same, except now Wingo can fire electric beams from the sky. When defeated, he lets go of Toadette and the Power Star, effectively defeating him.
After the tallest ladder, angling the camera right and down reveals an 8-bit Luigi in an alcove below.
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