Thomas/The Grim Adventures of Billy & Mandy

Version 1

 * Thomas as Grim
 * Percy as Billy
 * Rosie as Mandy
 * Diesel as Boogeyman
 * Spencer as General Skarr
 * Diesel 10 as Nergal
 * Elizabeth as Eris
 * Gordon as Jack O'Lantern
 * Oliver as Creeper
 * Sir Topham Hatt as Harold
 * Lady Hatt as Gladys
 * Bridget Hatt as Mindy
 * Stephen Hatt as Irwin
 * Edward as Phillip
 * Molly as Claire
 * Skarloey as Pud'n
 * Derek as Jeff the Spider
 * George as Sperg
 * Mr. Conductor as Inner Frat Boy
 * Troublesome Trucks as Clowns
 * Toby as Fred Fredburger
 * PT Boomer as Judge
 * Judge Judy the Diesel as Velma Green
 * Robo-Percy as Billybot

Version 2 (Villains)

 * Diesel as Billy
 * Daisy as Mandy
 * Diesel 10 as Boogeyman

Version 3 (Chase)

 * Diesel 10 as Harold
 * Lady as Gladys
 * Rusty as Billy

Version 4

 * Billy as Billy (Both share the same first name)
 * Emily, Daisy or Elizabeth as Mandy
 * Gordon as Jeff the Spider
 * Hector, Spencer, Bulgy, George, Iron Arry/Bert, Splatter/Dodge, The Spiteful Brake Van, S.C. Ruffey, Duncan, or Ace as Sperg
 * Rocky as Harold
 * Duck as Phillip
 * Molly as Claire