Squidward's brain is an internal organ in Squidward Tentacles' head. It first appears in the episode " Mermaid Man and Barnacle Boy IV."
Role in series
"Mermaid Man and Barnacle Boy IV"
SpongeBob, while messing with Mermaid Man's belt and trying to get Squidward back to normal size after shrinking him, summons a pair of scissors that cut Squidward in half and expose his brain.
It is among Squidward's organs seen by SpongeBob and
Patrick after they go inside Squidward to find his clarinet reed.
At the beginning of this episode, it rains because of Squidward's anger, but later, when he gets an electric shock and becomes happy, a rainbow appears.
Towards the end, after SpongeBob returns to
Bikini Bottom, Squidward opens his head and throws his brain into the garbage can.
Squidward's brain is again raining, but the rain halts and is replaced by a rainbow when Squidward comes up with a good musical symphony.
After his backstage pass is eaten by Patrick, Squidward gets so mad that he tears off the sides of his head, and his brain is visible.
SpongeBob and Patrick go inside Squidward's body and his brain is visible.
Squidward hits his head after seeing that the sea bunnies are in
his house, which results in his brain flying out, and he starts acting like a sea bunny.
Squidward is in shock upon seeing SpongeBob "drive" a
fancy self-driving car, so he uses the eraser of a pencil to delete this moment from his memory. After he puts his brain back in his head, he asks in a bumbling voice, "What's a SpongeBob?"
When SpongeBob and Patrick exit Squidward's head, Patrick is chewing on Squidward's brain. Squidward quickly takes it back.
It can be seen on the title screen of the game.