According to the Rev. W. Awdry, Alfred/98462 and 87546/Crovan were on trial from the other railway and were sent back for being nasty and rude. It is unknown what happened to them after they were sent away, but they were presumably scrapped.
- Crocbot and Octobot, Ball Hog and Roller, Hobson and Choy, or Rust and Bucket (Sonic the Hedgehog)
- Beaver and Hoghead (Tiny Toon Adventures)
- Amok and Overdrive or Scul and Bean (Teenage Mutant Ninja Turtles)