Cast[]
- Marge Simpson as Thomas
- Gia Moran as Edward
- Kimberly Hart as Henry
- Emma Goodall as Gordon (Emma and Gordon are both proud)
- Alia as James (Alia and James are both red)
- Ling Xiaoyu as Percy (Ling Xiaoyu and Percy are both cute and small)
- Aisha Campbell as Toby
- Becky as Duck
- Sora as Donald
- Mimi as Douglas
- T.J. Johnson as Oliver
- Juri as Diesel
- Jeff Fecalman & Mental Mike as Bill and Ben
- Tanya Sloan as BoCo
- Sigma as Daisy
- Grandpa Dave as Mavis
- Lisa Simpson as Stepney
- Homer Simpson as Emily
- Francine Smith as Bertie
- Stacy Jones as Salty
- Bulk as Arry
- Skull as Bert
- Muffy as Fergus
- Veemon as Skarloey
- Patamon as Rheneas
- Agumon as Sir Handel
- Palmon as Peter Sam
- Biyomon as Rusty
- Machinedramon as Duncan
- Agnes Skinner as Duke
- Hwoarang as Lady
- Hobart Hume as Diesel 10
- Sledgebolt as Splatter
- Buster King as Dodge
- The Queen as Sir Topham Hatt
- Zero as Terence
- Katherine Hillard as Trevor
- Mega Man X as Derek
- SkullGreymon as Bulgy
- Grandpa Abe as Elizabeth
- Rita Repulsa as George
- Lillie Lightship as Murdoch
- Devil Kazuya as Spencer
- Pal as Caroline
- Ancient Ogre as Cranky
- Scorpina as Scruffey
- Devidramon as Smudger
- Lumine as Bulstrode
- Craig Marduk as Rosie
- Tommy Oliver as Madge
- Billy Cranston as Molly
- Jake Hollings as Old Slow Coach
- Jun Kazama as Hank
- Bart Simpson as Flora
- Lei Wulong as Flying Scotsman (from RWS)
- Peggy Hill as Connor
- Hank Hill as Caitlin
- Goldar as D261
- Jason Lee Scott as Flynn
- Stan Smith as Belle
- Divatox as The Big City Engine
- Noah Carver as Millie
- Troy Burrows and Jayden as Annie and Clarabel