SpongeBob SquarePants, Season 13

Painty:
Who lives in a pineapple under the sea?

[SpongeBob opens the door, still in his underwear.]

Kids:
GrandPat Sea Star!

[GrandPat crushes SpongeBob and Hans gives him SpongeBob's pants.]

GrandPat:
Huh? [falls into a bathtub] Woah!

Painty:
Absorbent and yellow and porous is he.

[GrandPat's skin falls off and his bones disintegrate in the bathtub.]

Kids:
GrandPat Sea Star!

Painty:
If nautical nonsense be something you wish.

[Four GrandPats groan as they pull four banners that spell out "GrandPat Sea Star."]

Kids:
GrandPat Sea Star!

Realistic Fish Head:
Then drop on the deck and flop like a fish!

Kids:
GrandPat Sea Star!

Painty:
Ready?

Kids and Painty:
GrandPat Sea Star! GrandPat Sea Star! GrandPat Sea Star! [GrandPat mumbles as his body contorts until he's back to his sea star shape. He falls, screaming, onto some letters spelling out his name. His pants fall off and hop across the letters. His scooter then falls from above and pushes him down.]

Painty:
GrandPat... Sea Star! [laughs]

[We cut to the SpongeBob SquarePants logo as shown in the regular theme song, but the text is changed to Grandpat's own name, and it appewrs alongside a drawn GrandPat. GrandPat pulls out his dentures and they chatter the ending notes of the SpongeBob theme song. His dentures then bite his head.]