HM Slaves

HM Slaves are Pokémon used for the sole purpose of using HM moves when other Pokémon can't learn them, or they are unwanted in a Pokémon's moveset. Chuggaaconroy has used several of these in his Let's Plays.

Pokémon FireRed

Diglett

Diglett was caught in Episode 11. She was used for Cut, as well as Dig.

Diglett using Cut in Vermilion City.

Paras

Paras was caught in Episode 12. He was used for Cut and Flash.