Harold/Percy

Cast

 * Harold as Percy
 * Hank as Hiro
 * BoCo as Gordon
 * Derek as BoCo
 * Bulgy as Duncan
 * Jeremy as Billy
 * Salty as James (Salty and James are both red)
 * Bertie as Thomas
 * Bill as Bill
 * Ben as Ben
 * Trevor as Stepney
 * S.C. Ruffey as Diesel 10
 * Donald as Bash
 * Douglas as Dash
 * Henry as Ferdinand
 * Isobella as Elizabeth
 * Madge as Molly
 * Whiff as Oliver (Whiff and Oliver are both green)
 * Rosie as Rosie
 * Duck as Harold
 * Toby as Freddie
 * Colin as Colin
 * Splatter as Norman
 * Dodge as Paxton
 * Stanley as Rheneas
 * Jack as Charlie
 * Alfie as Fergus
 * Byron as Neville
 * Ned as Whiff
 * Kelly as Arthur
 * Patrick as Dennis
 * Nelson as The Old Engine (from RWS)
 * Buster as Salty
 * Bash as Den
 * Dash as Dart
 * Puffa (from TUGS) as Rusty
 * Flora as Olivia
 * Smudger as Diesel
 * Arry as Arry
 * Bert as Bert
 * Randy Marsh (from South Park) as Sir Topham Hatt
 * Sharon Marsh (from South Park) as Lady Hatt
 * Ferdinand as Jack
 * Oliver as Toby
 * Rocky as Kevin
 * Gordon as Victor
 * James as George
 * Caroline as Daisy
 * The Spiteful Breakvan as Hector
 * Hiro as Hank
 * D261 as Mallard (from RWS)
 * Elizabeth as Henrietta
 * Hector as Cranky
 * Diesel as Smudger