Mirror Mansion
Mirror Mansion was a giant and demonic House of Mirrors that Wario had to go through in Wario World. This level was chock-full of maddening puzzles, including a huge maze of giant rotating rings. A lot of times, Wario will be obscured from view by a large mirror, forcing the player to view him on a mirror on the opposite wall, and/or shift the camera angle inconveniently. There are many enemies, traps, and two Terrible Portraits that Wario must defeat to advance. There are a lot of different areas in the mansion, (including one where Wario must scramble up a metal grate, a la Super Mario World) After an arduous task of defeating the Mirror Mansion, Wario fights the Mean Emcee.
Enemies here are Puppet Magons, Masked Clubbers, Masked Crows, and Stuffed Ankirons.
Area-Specific Enemies here include Magicians, Ninja Crows, and Witches.
The impediment here is the Terrible Portrait.
All of Wario's Treasures here are made of glass.