you find the girls kid that was lost in the ball pit. then u use the fishsticks you get to get the crab lowering it to your helicopter
To catch the crab
Use the crab to grab the bill. Then go to the boys and take the money.
Use the helicopter with the fish sticks to catch a crab, then use the crab to grab the $20 bill. For the full solution, see the related questions
after you get Rowly out of the slide,he will go down and Fregley will come up.If you already talked to the lady near the pit she will say that she lost her child.Well guess what!Thats Fregley's mom.She will thank you and say ''you can have Fregely's leftover fish sticks''.Then you use the fish sticks to catch the crab.
You get the helicopter and the fish sticks and catch the crab to get Gregs money back.
The crab is in the water and walks up onto the very edge of the beach and back. Once you have the helicopter and the fish sticks (from Fregly's mom in the Funhouse), you can catch the crab and use him to grab the $20 bill.
go to the beach and just before the water use the helicopter and get the crab. go up above the teenagers and get the money
Once you get the helicopter, go to the Funhouse, where Rowley is stuck in the tunnel slide. Climb up and use the Oily Suntan Lotion to free him. Fregly will appear out of the ball pit, and his mom will give you some leftover fish sticks. Use them as the bait. (Didn't get the Oily Lotion? Give the sunscreen that you get from the photo guy to the big hairy guy near the water.)
You use it to grab the $20 bill. But first you need the fish sticks from Fregly's mom. After you leave Rowley at the bumper cars, he gets stuck in the slide inside the Funhouse. Use the oily lotion (from the hairy man on the beach) to get him loose. Put a fish stick on the helicopter's hook and use it as bait to catch the crab at the ocean's edge. Go to the pier and use the crab to grab the $20 bill.
use it for yourself
you get Fregley's fish sticks (after you use the suntan lotion to get Rowley unstuck from the slide) and at the place (what ever it is called XD) where you get you picture taken for the keychain and fly it near the water and a crab will come out. then the crab will be stuck to the hook. then put the crab near Greg's money. go down under the boardwalk and then you finshed the island!
go to the fun house use the sunscreen to get rowley out of the slide and you get fish sticks and at the beach get the crab with helicopter