Cast[]
- Snowball as Thomas
- Lightning as Edward
- Spongy as Henry
- Eraser as Gordon
- Pen as James
- Blocky as Percy
- TV as Toby
- Announcer as Sir Topham Hatt
- Firey Speaker Box as The Thin Controller
- Gelatin as Duck
- Bon Bon (from MLP) as Donald
- Lyra (from MLP) as Douglas
- Fries as Oliver
- Fanny as Diesel
- Snips (from MLP) as Bill
- Snails (from MLP) as Ben
- Tennis Ball as BoCo
- Flower as Daisy
- Pin as Mavis
- Loser as Stepney
- Bus (from Magic School Bus) as Bertie
- Thumper (from TTTE) as Terence
- Nelson (from TTTE) as Trevor
- Jay Jay (from Jay Jay the Jet Plane) as Harold
- Diesel (from TTTE) as George
- Diesel 10 (from TTTE) as Bulgy
- Winston (from TTTE) as Caroline
- Donald (from TTTE) as Annie
- Douglas (from TTTE) as Clarabel
- Mavis (from TTTE) as Henrietta
- Rocky as Toad
- Changelings (from MLP) as Troublesome Trucks
- Queen Chrysalis (from MLP) as S.C.Ruffey
- King Sombra (from MLP) as Spiteful Breakvan
- Four as D701
- X as Class 52
- Luke (from TTTE) as D782
- Book as Class 40
- Arry (from TTTE) as 98462
- Bert (from TTTE) as 87546
- James (from TTTE) as Eagle
- Yellow Face as Flying Scotsman
- Thomas (from TTTE) as Jinty
- Bill/Ben (from TTTE) as Pug (Bill and Ben share Pug's role)
- Shining Armor (from MLP) as City of Truro
- Leafy as Wilbert
- Bell as Sixteen
- Jack (from TTTE) as Skarloey
- Alfie (from TTTE) as Rheneas
- Byron (from TTTE) as Sir Handel
- Ned (from TTTE) as Peter Sam
- Buster (from TTTE) as Rusty
- Patrick (from TTTE) as Duncan
- Kelly (from TTTE) as Duke
- Oliver (Pack) (from TTTE) as Ivo Hugh
- Max/Monty (from TTTE) as Stanley/No.2 (Max and Monty share Stanley/No.2's role)
- Isobella (from TTTE) as Fred
- Gallus (from MLP) as Mike
- Sandbar (from MLP) as Rex
- Ocellus (from MLP) as Bert
- Yona (from MLP) as Jock
- Smolder (from MLP) as Frank
- Silverstream and Terramar (from MLP) as Blisters 1 and 2
- Berry Bliss (from MLP) as The Sigrid of Arlesdale
- Smudger (from TTTE) as Godred
- Rheneas (from TTTE) as Ernest
- Rusty (from TTTE) as Wilfred
- Skarloey (from TTTE) as Culdee
- Duke (from TTTE) as Shane Dooiney
- Duncan (from TTTE) as Lord Harry/Patrick
- Sir Handel (from TTTE) as Alaric
- Peter Sam (from TTTE) as Eric
- Taco as Catherine
- Old Slow Coach (from TTTE) as The Truck
- Pencil as Isabel
- Match as Dulcie
- Bubble as D7101/Bear
- Ice Cube as D199/Spamcan
- Liy as Old Stuck Up
- Bracelety as The Works Diesel
- Granny Smith (from MLP) as Toby's Brother
- Hiro (from TTTE) as The Old Engine/1020
- Bulgy (from TTTE) as Bulstrode
- Fergus (from TTTE) as Neil
- Nickel as Cromford
- Stanley (from TTTE) as Captain Baxter
- Donut as The Foreign Engine
- Connor (from TTTE) as Mallard
- Glynn (from TTTE) as Albert
- Judy (from TTTE) as Victoria
- Jerome (from TTTE) as Helena
- Toad (from TTTE) as Elsie
- Lollipop as Pip
- Teardrop as Emma
- Coiny as Adams
- Stephen (from TTTE) as Iron Duke
- Henry (from TTTE) as Green Arrow
- Rocky (from TTTE) The Ballast Speader
- Jebediah (from The Little Engine That Could) as 8783
- Caitlin (from TTTE) as Duchess of Hamilton
- Marker as Boxhill
- Stapy as Bluebell
- Foldy as Primrose
- Annie (from TTTE) as Alice
- Clarabel (from TTTE) as Mirabel
- Puffball as Cora
- Naily as 10751
- Saw as 31120
- Lana (from The Loud House) as Gertrude
- Lola (from The Loud House) as Millicent
- Lily (from The Loud House) as Ada
- Lisa (from The Loud House) as Jane
- Lucy (from The Loud House) as Mabel
- Lori (from The Loud House) as Agnes
- Leni (from The Loud House) as Ruth
- Luna (from The Loud House) as Lucy
- Luan (from The Loud House) as Jemima
- Lynn (from The Loud House) as Beatrice
- Tree as The Dark Green Tank Engine
- Pie, Pillow, Remote and Black Hole as Percy's Friends