Barnacle Boy is an alternate-universe version of Barnacle Boy who appears in the episode "Back to the Past."
Description[]
He looks almost identical to the normal Barnacle Boy, but he has a Man Ray hat and works at the alternate-universe version of the Krusty Krab.
Role in episode[]
When SpongeBob walks up in the counter in the alternate-universe version of the Krusty Krab, he expects to see Squidward, but he actually sees Barnacle Boy. SpongeBob wonders why he is here, but he says he is taking stuff in a wasted life. Later on, while Mermaid Man is talking about how his young self was dead, he says they are out of tartar sauce. It turns out Patrick ate it all.
Later on, when Barnacle Boy and Mermaid Man from the Man Ray timeline appear, he says to Patrick from that timeline to keep his tongue from the tartar sauce. However, he still ate all of it.