Diesel 15/Thomas


 * Diesel 15 as Thomas
 * Scruffey as Edward
 * Big City Engine as Henry
 * George as Gordon
 * Bulgy as James
 * Diesel 10 as Percy
 * Spencer as Toby
 * Duncan as Duck
 * Farnsworth (from The Little Engine That Could) as Donald
 * Pete (from The Little Engine That Could) as Douglas
 * Smudger as Oliver
 * Hank as Diesel
 * Splatter as Bill
 * Dodge as Ben
 * Crovan as BoCo
 * Lillie Lightship (from TUGS) as Daisy
 * Jenna the Rude Female Diesel as Mavis
 * Sixteen as Stepney
 * Elizabeth as Emily
 * Hector as Bertie
 * D261 as Salty
 * Bobby Barge (from Theodore Tugboat) as Harvey
 * Skarloey as Arry
 * Rheneas as Bert
 * Bulstrode as Fergus
 * Arry as Skarloey
 * Bert as Rheneas
 * The Freight Engine (from The Little Engine That Could (Book)) as Sir Handel
 * The Shiny Engine (from The Little Engine That Could (Book)) as Peter Sam
 * Norman as Rusty
 * Duck as Duncan
 * Mallard as Duke
 * Paxton as Freddie
 * Zebedee (from TUGS) as Mighty
 * Zak (from TUGS) as Mac
 * The Chinese Dragon as Arthur
 * Pinknose as Lady
 * Percy as Diesel 10
 * Bill as Splatter
 * Ben as Dodge
 * Mandark (from Dexter's Laboratory) as Sir Topham Hatt
 * Lalava (from Dexter's Laboratory) as Lady Hatt
 * Lorry 1 as Terence
 * Lorry 2 as Trevor
 * The Spiteful Brakevan as Toad
 * Bluenose (from TUGS) as Derek
 * James as Bulgy
 * Emily as Elizabeth
 * Gordon as George
 * Cabot (from Theodore Tugboat) as Murdoch
 * Toby as Spencer
 * Constance (from Theodore Tugboat) as Caroline
 * Colin as Cranky
 * Edward as Scruffey
 * Meowth (from Pokemon) as Mr. Percival
 * Glameow (from Pokemon) as Mrs. Percival
 * Tiger Moth as Harold
 * Judge Judy the Diesel as Rosie
 * Oliver as Smudger
 * Fergus as Bulstrode
 * Steam Engine as Stanley
 * Toad as The Spiteful Brakevan
 * Mr. Conductor's Evil Twin (from Shining Time Station) as Jack
 * Robotnik (from Sonic the Hedgehog) as Alfie
 * Mr. Burns (from The Simpsons) as Oliver (Pack)
 * Tex (from Shining Time Station) as Max
 * Rex (from Shining Time Station) as Monty
 * The Angry Videogame Nerd (from The Angry Videogame Nerd) as Kelly
 * P. T Boomer (from Thomas & The Magic Railroad) as Byron
 * Hobart Hume (from Shining Time Station) as Ned
 * Vickie (from Shining Time Station) as Isobella
 * Jackson Storm (from Cars 3) as Nelson
 * Buster (from Shining Time Station) as Patrick
 * Danny (from Tourettes Guy) as Buster
 * Captain Zero (from TUGS) as The Foreman
 * Mrs. Zero (a Fan-Made character) (from TUGS) as Miss Jenny
 * Terence as Lorry 1
 * Trevor as Lorry 2
 * Thumper as Lorry 3
 * Salty as D261
 * Den as Whiff
 * Dart as Scruff
 * Spamcam as Dennis
 * Boulder as Jeremy
 * Rebecca (from Theodore Tugboat) as Molly
 * Zorran (from TUGS) as Billy
 * Martha the Yellow Steamroller as Belle
 * Quorton as Flynn
 * Bristleback the Diesel as Old Slow Coach
 * Zug (from TUGS) as Bash
 * Zip (from TUGS) as Dash
 * Smelter (from TUGS) as Ferdinand
 * Enda as Annie
 * Rouge as Clarabell
 * Tex (from Theodore Tugboat) as Rocky
 * Stanley/No. 2 as Proteus
 * Diesel as Hank
 * Cranky as Colin
 * Lord Harry as Charlie
 * Evil Rosie as Flora
 * Bertie as Hector
 * Old Stuck-Up as Bertram
 * Johnny Cuba (from TUGS) as Neville
 * Nantucket (from TUGS) as Captain
 * Whiff as Den
 * Scruff as Dart
 * Rusty as Norman
 * Freddie as Paxton
 * Luke as Sidney
 * Evil Emily as Madge
 * Snorri (from Theodore Tugboat) as Butch
 * Purplenose as Hiro
 * Fred Pelhay as Victor
 * Rickety as Kevin
 * Arthur as The Chinese Dragon
 * Lorry 3 as Thumper
 * Suzy Johnson (from Phineas and Ferb) as Henrietta
 * Sidney as Luke
 * Evil Colin as Merrick
 * Evil Big Mickey (from TUGS) as Owen
 * R Boat (from Theodore Tugboat) as Winston
 * Alfred the Loaned B12 as Stafford
 * Robo-Thomas as Stephen
 * Evil Lady as Millie
 * Evil Connor as Connor
 * Evil Caitlin as Caitlin
 * Harold as Tiger Moth
 * Jeremy as Boulder
 * Robo-Percy as Porter
 * Evil Thomas as Gator
 * Scrap Heap Monster as Reg
 * Carla (from Theodore Tugboat) as Marion
 * Supremely Evil Thomas as Timothy
 * Evil Percy as Samson
 * Reg as Scrap Heap Monster