Cast[]
Version 1[]
- Thomas as Tarzan (Both the main characters)
- Emily as Jane (Both beautiful)
- Molly as Kala (Both mother figures to Thomas and Tarzan)
- Rheneas as Baby Tarzan
- Percy as Young Tarzan
- James as Tantor
- Mavis as Terk
- Gordon as Kerchak
- Steam Engines as Gorillas
- Edward as Professor Porter
- Diesel as Clayton
- The Evil Diesels as Clayton's Men
- Henry as Zugor
- Smudger as Uto (Both evil and mean)
- George as Kago (both evil and mean to Thomas and Tarzan)
- Diesel 10 as Tublat (Both devious, evil, and mean to Thomas and Tarzan)
- Johnny (from The Brave Engineer/Casey Jr and Friends) as Teddy Roosevelt
- Frankie as Sabor (Both evil)
- Vinnie as Mabaya
- Troublesome Trucks as Baboons
- Bill and Ben as Flynt and Mungo (All of them are twins)
- Millie as Young Terk
- Sir Handel as Young Tantor
- Flora as Baby Gorilla
- The Z Stacks (from TUGS) as Leopard People and The Soldiers
- Evil Clone of Mavis as Queen La (Both the main female villains)
- Hercules and Lillie Lightship (from TUGS) as Tarzan's Parents
- Donald and Douglas as The Rhinoceros and The Bird (All of them are twins)
- The Express Coaches as More Leopard People
- Bulgy and The Horrid Lorries as Professor Philander Bo and Scox
- Steamies and Diesels as Other animals and Other characters
Version 2[]
- Thomas as Tarzan (Both the main characters)
- Emily as Jane (Both beautiful)
- Molly as Kala (Both mother figures to Thomas and Tarzan)
- Rheneas as Baby Tarzan
- Percy as Young Tarzan
- Gordon as Tantor
- Mavis as Terk
- Henry as Kerchak
- Steam Engines as Gorillas
- Edward as Professor Porter
- Diesel as Clayton
- The Evil Diesels as Clayton's Men
- Toby as Zugor
- Smudger as Uto (Both evil and mean)
- George as Kago (both evil and mean to Thomas and Tarzan)
- Diesel 10 as Tublat (Both devious, evil, and mean to Thomas and Tarzan)
- Johnny (from The Brave Engineer/Casey Jr and Friends) as Teddy Roosevelt
- Frankie as Sabor (Both evil)
- Vinnie as Mabaya
- Troublesome Trucks as Baboons
- Bill and Ben as Flynt and Mungo (All of them are twins)
- Millie as Young Terk
- Sir Handel as Young Tantor
- Flora as Baby Gorilla
- The Z Stacks (from TUGS) as Leopard People and The Soldiers
- Evil Clone of Mavis as Queen La (Both the main female villains)
- Hercules and Lillie Lightship (from TUGS) as Tarzan's Parents
- Donald and Douglas as The Rhinoceros and The Bird (All of them are twins)
- The Express Coaches as More Leopard People
- Bulgy and The Horrid Lorries as Professor Philander Bo and Scox
- Steamies and Diesels as Other animals and Other characters
Version 3[]
- Thomas as Tarzan
- Emily as Jane
- Edward as Professor Porter
- Henry as Kerchak
- Molly as Kala
- Ashima as Terk
- James as Tantor
- Cerburus (from The Little Engine That Could 2011 Film) as Clayton
- Other Diesels as Clayton's Men
- Frankie as Sabor
- Diesel as Tublat
- Diesel 10 as Mabaya
- Luke as Baby Tarzan
- Percy as Young Tarzan
- Rosie as Young Terk
- Duncan as Young Tantor
Version 4[]
- Thomas as Tarzan
- Emily as Jane
- Gordon as Professor Porter
- Henry as Kerchak
- Emily as Kala
- Ashima as Terk
- James as Tantor
- Frankie as Sabor
- Luke as Baby Tarzan
- Percy as Young Tarzan
- Rosie as Young Terk
- Sir Handel as Young Tantor
- Diesel as Clayton
- Diesel 10 as Tublat
- Cerburus (from The Little Engine That Could 2011 Film) as Mabaya
Version 5[]
- Thomas as Tarzan (Both the main characters)
- Emily as Jane (Both beautiful)
- Molly as Kala (Both mother figures to Thomas and Tarzan)
- Rheneas as Baby Tarzan
- Percy as Young Tarzan
- Gordon as Tantor
- Mavis as Terk
- Henry as Kerchak
- Steam Engines as Gorillas
- Edward as Professor Porter
- Diesel as Clayton
- The Evil Diesels as Clayton's Men
- Toby as Zugor
- Smudger as Uto (Both evil and mean)
- George as Kago (both evil and mean to Thomas and Tarzan)
- Diesel 10 as Tublat (Both devious, evil, and mean to Thomas and Tarzan)
- Johnny (from The Brave Engineer/Casey Jr and Friends) as Teddy Roosevelt
- Frankie as Sabor (Both evil)
- Vinnie as Mabaya
- Troublesome Trucks as Baboons
- Bill and Ben as Flynt and Mungo (All of them are twins)
- Millie as Young Terk
- Sir Handel as Young Tantor
- Flora as Baby Gorilla
- The Z Stacks (from TUGS) as Leopard People and The Soldiers
- Evil Clone of Mavis as Queen La (Both the main female villains)
- Hercules and Lillie Lightship (from TUGS) as Tarzan's Parents
- Donald and Douglas as The Rhinoceros and The Bird (All of them are twins)
- The Express Coaches as More Leopard People
- Bulgy and The Horrid Lorries as Professor Philander Bo and Scox
- Steamies and Diesels as Other animals and Other characters