Alternate-Universe Squidward is a creature who looks exactly like Squidward Tentacles, except he is confined within mirrors or appears in an alternate universe, and is actually alive. He first appears in the episode "The Algae's Always Greener."
Role in series
"The Algae's Always Greener"
Alternate-Universe Squidward appears instead of normal Squidward, during the entirety of the scenes in Plankton's alternate universe.
Alternate-Universe Squidward appears several times during the episode. He appears whenever Squidward looks into something reflective. AU Squidward is the person Squidward takes to the Galleria Diphtheria as Squidward made SpongeBob carry a mirror. In the end, AU Squidward tells the real Squidward he will always be his plus one, which delights the latter.