The Petropolis Monotrail is a new railroad transport system in Petropolis that was only seen in "Forget Me Mutt." It was destroyed once by Verminious Snaptrap, but it was rebuilt.
Trivia
- The monotrail is a parody of a monorail.
- The monotrail resembles a habitrail while its name is also a combination of monorail and habitrail.
- The top of the monotrail looks exactly like Kitty's head.
- The monotrail is seen in the background in numerous episodes.
