SpongeBob SquarePants: Revenge of the Flying Dutchman

Jelly Fishing Gear:
Bodyslam the target at the Krusty Krab to get the Jelly Fishing Gear

Reep Blower Costume:
Win the jelly fishing contest in Jelly Fish Fields to get the Reep Blower costume.

Merman Costume:
Deliver crabby cakes to the downtown construction site to get the Merman costume.