Dexter's Laboratory/Thomas

Version 1 (made by ThomastheUSEpisodes)

 * Dexter as Thomas
 * Major Glory as Edward
 * Krunk as Henry
 * Dexter's Dad as Gordon
 * Tall Dexter as James
 * Dexter's Monkey as Percy
 * Dexter's Grandpa as Toby
 * Peter (from Family Guy) as Duck
 * Mitch and Clem, The Puppet Pals as Donald & Douglas
 * Chris (from Family Guy) as Oliver
 * Mandark as Diesel
 * Koosalagoopagoop as BoCo
 * Meg (from Family Guy) as Daisy
 * Dexter's Mom as Mavis
 * Dee Dee as Emily
 * Valhallen as Bertie
 * Pony Puff Princess as Lady
 * Computer as Henrietta
 * Lee Lee as Molly
 * Mee Mee as Rosie
 * Mr. Luzinski as Sir Topham Hatt
 * Mandark's Duck as George
 * Action Hank as Murdoch
 * The Simpsons Characters as The Narrow Gauge Engines
 * Homer as Skarloey
 * Lenny as Rheneas
 * Principal Skinner as Sir Handel
 * Barney as Peter Sam
 * Grandpa Abe as Rusty
 * Bart as Duncan
 * Ned Flanders as Duke
 * Carl as Freddie
 * Mr. Burns as Smudger
 * Mr. Smithers as Bertram
 * Mario & Luigi (from Mario) as Mighty Mac