Bowser's Villa 8-5
From the Super Mario Wiki
The level autoscrolls at the start, and at the end of the section is a door that leads to the next area that has branching paths. If the player goes to the left they will get to a door. If they head to the right, they will find a platforming section which leads to two doors, the door on the top leads to a dark room, where the player needs to use blue Podoboos to light the torches. Following this is a room where the player needs to be in the air at various intervals to avoid getting detected by a Security Thwomp that takes up the background, this leads back to the room with the branching paths, and the Toad that is in that room.
If the player goes through the bottom door, then they will go to a room where they are being chased by Blindfold Boos, and the Gloom vibe will need to be used to outpace them. The next room has a Hothead, and several moving stone platforms. To the left of the room, at the top, is a Puzzle Piece. Midway through the room, in between some platforms is another Toad, at the end of the is Warp Pipe that will lead back the room with the branching paths.
If the player goes through the door on the left goes to a room with Robotic Arms and various other enemies, at the end of the room is a door. The next room has several narrow passageways, and various enemies. At the end of the room is another Toad and a Warp Pipe, which will lead back to the room with the branching paths. In the middle of the room, at the top, is another door that leads to a room filled with Warp Pipes, and if the player goes down the Warp Pipe that is third from the right, from when they are transported to, then they will go the the final area that has a Calm Hammer Bro and the goal gate.