Patrick is wearing Barnacle Boy's suit, which looks almost identical to the real Barnacle Boy's costume. It has Barnacle Boy's head at the top along with his blue scarf. As well as this, there are green-blue gloves and blue flippers on the suit.
Role in episode
He appears with ManBob throughout the episode. The two are posing as Mermaid Man and Barnacle Boy while they are hospitalized. ManBob and PatBoy arrest the Bikini Bottomites for committing "crimes." They also shrink Man Ray's head using a dryer in the laundromat.
At the end of the episode, once the real Mermaid Man and Barnacle Boy are released from the hospital, the Bikini Bottomites chase after them for "their" actions, oblivious to SpongeBob and Patrick's responsibility for posing as the heroes.