Go to the carnival at Goo Lagoon. First, throw the watermelon at the robot in the ticket booth. Destroy all of the other robots. Jump to where the Ferris wheel is located. Destroy the Duplicatotron and continue until you see Wack-A-Tiki. Throw the watermelon at the button and jump to where the tikis pop up. Destroy all of them in 40 seconds. Note: If this is your first time playing, you will get a sock if you win. Continue until you find a skee-ball machine. Switch to SpongeBob and Bubble Bowl into it. If you do not have it, get fifteen spatulas and go to the toll booth in Bikini Bottom. Note: If the ball does not reach any holes except the "10" and "20", charge up the Bubble Bowl by holding down Circle. Do this as many times as needed and you will have enough to trade with Mr. Krabs. The amount of shiny objects you need increases every time you trade with him.