Date of Birth
- December 14, 2000
Sidney can be a bit of a forgetful engine. He starts his day at one location and ends up at another, not remembering how he got there! Although Sidney is kind-hearted and has good intentions, his lackadaisical demeanor and struggle with short term memory loss causes many engines to doubt his ability.
Sidney is based on the BR Class 08, yet in The Ulimate Character Guide, he is based on BR Class 09. He is fitted with a VR 3-chime horn, P or T Class.
Sidney is painted blue with orange lining and a warning panel underneath his face. He has yellow siderods and red wheels with black rims.
- Day of the Diesels (not named)
- Tale of the Brave
- The Lost Puff
- The Missing Christmas Decorations
- Bob Golding (UK/US)
- Wooden Railway
- Trackmaster (coming soon)
- Sidney's theme is the Roll Call from the Day of the Diesels theme song, which he shares with Den, Dart, Norman, and Paxton.
- Gregor (Theodore Tugboat)
- Bob-omb Buddy (Super Mario Bros.)
- Little Cat G (Dr. Seuss)
- Balon von Ball (31 Minutes, Both are Forgetfil)
- Francis X. Bushlad (Taz-Mania)
- Yidnier or Don bear (Titielenaders)
- New Brian (Family Guy)
- Fake Vakama or Jaller (Bionicle, Sidney and Jaller are Both Forgetful)
- Customer Service (Kirby)
- Tree Stump With Sign (Adventure Time)
- Forgetful Jones (Sesame Street)