Exploring
The key to "Scooby-Doo! and the Spooky Swamp" is taking time to explore the levels. You must collect several items to truly defeat the game. These items include Scooby Snacks, Scooby Medallions, ghost pictures and trophies. Interact with as many as things as possible. Smash objects, search and go around levels completely to find objects. Switch characters to reach different heights and areas.
Characters
Each of the Scooby-Doo characters has a different attack: using them all will get you through levels more quickly. Once you learn the various attacks, you can quickly switch the characters and solve the mystery. Scooby-Doo is good for close combat because he uses sausage nunchuks to attack enemies. Shaggy has access to a slingshot to shoot specific areas on monsters, like their heads. Fred has boxing skills and strength that can help move large objects. Daphne can climb up on objects and jump high with karate skills. Velma can activate any devices to open doors and reach other parts of levels.
Two Players
With a second Wii Remote and Nunchuk, the two-player option will make several parts of the game easier. When getting from place to place, it is easier to use one player so that no one has to wait. Once you reach a large enemy or group of enemies, activate the second player so combat is easier and faster. With two players you can attack from different directions and knock down enemy health faster.
Cheat Codes
Four cheat codes offer various changes to the game. Enter the Cheat Code menu to access them. Use the code "2654" to play in "Big Head" mode. Use the cheat code "3293" to alter character voices so they are squeaky and high-pitched. Enter the code "9991" to activate double damage. This will make it easier for you to kill enemies. Use the code "1954" for slow-motion mode. This gives you more accuracy for attacks and jumps.