Super Mario Infinity 2: The Cursed Gem/Goals/Verdant Valley
From SMWiki
Verdant Valley 3 Secret Exit
Toward the top of the mountain, after a long bottom-left to top-right slope with a blue Koopa, fall down on the right side to find a platform with a Rotating Block. Hit it to get a P-Switch, and take the P-Switch to the end of the level.
Bowser's Outpost Normal Exit
When you get the P-Switch, take it to the right of the starting area to generate a door.
