Instructions
Start the game. After the introduction is completed, follow the path through the swamp until you meet Lila. Go right from her dwelling to reach the dojo, and defeat the spider boss to prove your worth.
Return to Lila, where she informs you to return to the rest of the gang and travel to the town of El Muncho.
Retrace your steps back through the swamp, and watch the cut-scene once you reach the rest of the gang. Press the "Circle" button while facing the van, and then select "El Muncho" from the map.
Watch the cut-scene where the sheriff captures everyone and puts them in jail. Once you have control again, select Scooby or Shaggy using the "Triangle" button, and use his special abilities ("Circle" button) to escape from the cell.
Explore the town until you find the gun powder keg in the saloon. Most of the paths are blocked off so you won't get lost. Return to the jail with the keg, and walk up to the fireworks in the alley next to the cell, to trigger an escape. You now have full control over the whole gang. Hold down the "Triangle" button and rotate through the characters with the left analog stick, to select any one of them.
Make your way to Costington mansion, by using the gang's special abilities to solve puzzles en route. Speak to Costington once you arrive, to find out about the cemetery. Enter his mansion and speak to his servant, who asks for your help in clearing out the ghosts.
Clear out the ghosts in the room, and then go to the two adjacent rooms to clear out more ghosts. Press the "Circle" button in front of the windows to close them, so no more ghosts can enter. Return to the servant, who tells you he wants his harmonica before he will open the gates leading to the cemetery.
Collect the three books that are scattered throughout the mansion, and take them to the library. The fireplace will open, revealing the hidden musical instrument. Return it to the servant, and the path to the cemetery will open.
Follow the path until you meet the gravedigger. Continue along the path to the right until you reach the old cemetery, and locate the valve he is looking for. Jump up on the walls of the cemetery, and press the "Square" button to toss the valve over toward him. In return, you get the crypt key from him.
Go to the crypt at the back of the cemetery with the key in your possession, and it will open. When you enter, all Lila's scraps will be scattered around the crypt. Kill the spiders and walk over the scraps to collect them all. Once you pick up the final one, a puzzle will initiate where you have to rotate the scraps and piece them together to reveal a recipe.