All Action Figures
Enter 977548 at the in-game cheats screen.

Patrick Star
Pull off a 20-Patty Combo on "Flippin' Out" in Bronze Story Mode.

Mr. Eugene Krabs
Make sure you don't hit anymore than 3 objects on "Inflatable Pants" in Silver Story Mode.

Sandy Cheeks
Pull off 5 consecutive bonuses on "Goo-Ladiators" in Silver Story Mode.

Kevin C. Cucumber
Get more than three 5-Jelly Combo's on "Jellyfish Jamboree" in Gold Story Mode.

Hook, Line and Cheddar Mini-Game
Enter 893634 in the in-game cheats menu.