Shuffleboarding: Mermaidman and Barnacleboy are booked to attend a shuffleboarding tournament, but they can’t go because they’re laid up in the hospital. So their #1 fans, SpongeBob and Patrick, offer to dress up as the superhero duo and attend in their place. But instead of just attending the shuffleboarding tournament, SpongeBob and Patrick decide that while they’re dressed up as Mermaidman and Barnacleboy, why not try a little crime-fighting for one day?