|First appearance||Where No Fan Has Gone Before|
|Voiced by||David Herman|
Welshy was the replacement actor for Scotty on the television show, Star Trek. Welshy replaced James Doohan because when the cast reunited for the musical specials, "the guy who played Scotty had trouble yodeling". After Bender Bending Rodríguez doubts Melllvar's powers, Melllvar kills Welshy to make an example. Throughout the show, Melllvar vents his frustration of Philip J. Fry I's superior Star Trek knowledge by electrocuting Welshy's corpse repeatedly to the point where it combusts.
- Welshy only has two lines in Where No Fan Has Gone Before; "Aye!" and "Dwi wedi meddwi'n chwil" ("I am very drunk" in Welsh).
- Welshy is a good example of a redshirt character.