When Mr. Welker (Timmy) goes behind the wheel of his yellow motor cart, he becomes an evil uncontrolable monster (a demon driver). Mr. Welker is now Mr. Wheeler! So he take over lots of roads and the cars accidents, lots of accidents.
- Timmy Turner (as Mr. Welker and Mr. Wheeler)
- Timmy (Mr. Welker and Mr. Wheeler)'s yellow motor cart
- Drivers' cars
- Kid's scooter