copy_goku
Anime-only character from the original Dragon Ball (Classic), appearing in episode 130, "Goku's Opponent is... Goku?!", otherwise known as Goku's Doll. The character received a proper name in Japanese in the Game Boy game Dragon Ball Z: Goku Hishouden, being known as Copy Goku, while English resources refer to it with the dubbed episode title.
It is a copy of Goku created by Mister Popo. Initially introduced wearing a mask, with it removed, it is revealed the copy's face bares a completely blank expression, with a near exact-copy of Goku's face, except with Popo's eyes in place.