Smelter is an evil tugboat with a mechanical claw on his back who wants to destroy the harmony on Bigg City Port.
- Smelter was going to appear in TUGS, but was later dropped.
- Diesel 10, Diesel 11 or Diesel 12 - Thomas the Tank Engine and Friends
- Smithy - Super Mario Bros.
- SaTaM Dr. Robotnik - Sonic the Hedgehog
- Robo-Pig - Garfield and Friends
- Dr. Gene Splicer - Tiny Toon Adventures
- King Salazar - Animaniacs
- Evil the Cat - Earthworm Jim
- Jinpachi Mishima - Tekken, There both the Final Boss Character
- King Sombra - My Little Pony: Friendship is Magic
- Russ Cargill or Snake Jailbird - The Simpsons
- Smelter/The Little Engine That Could
- Smelter/Winnie the Pooh
- Smelter/Shining Time Station
- Smelter/The Simpsons
- Smelter/Family Guy