How do you get to the red baron in Scooby Doo 100 frights?

To reach the Red Baron in "Scooby-Doo! 100 Frights," you'll need to progress through the game until you unlock the level called "The Haunted Castle." In this level, you must solve puzzles and defeat enemies while collecting Scooby Snacks and other items. Once you complete the necessary tasks, you'll face the Red Baron in a boss battle. Defeating him will allow you to continue your adventure in the game.