Instructions
Power on your Nintendo Wii and insert the "Scooby Doo: First Frights" game disc into the front slot.
Use your Wii controller to select "Story Mode" and begin a new game.
Press the "A" button on the Wii controller to cycle between the two players you're given in the beginning of the game.
Complete the entire game in story mode and return to the main menu. "Explore Mode" will now be an available option in the menu.
Select "Explore Mode" to begin a new game.
Press and hold the "A" button and a wheel will appear on the bottom corner of the screen. In this wheel will be all the Mystery Inc. characters.
Use the controller to cycle through the characters until you come to the one you want. You will then play as that character. Press and hold "A" to change characters again.