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Female Thomas Characters/Sonic Underground is a Parody with Sonic Underground sounds and Female Thomas Characters clips.
- Rosie as Sonic
- Whiff as Manic
- James as Sonia
- Diesel 10 as Dr. Robotink
- Pip as Sleet
- Emma as Dingo
- Troublesome Trucks as SwatBots
- Neville as Trevor
- Charlie as Cyrus
- and more