3rd Scooby-Doo sequel/Scooby-Doo Monsters Unleashed

You've faced a couple of ghosts in High school, you've defeated a witch and her lake monster at a Country Club, and have even prevented a power hungry puppy dog from taking over the world on Spooky Island. But are you up to the challenge of facing what could be your most difficult mystery? After being invited to an opening of an exhibition at the Coolsonian Criminology Museum, you and the rest of the gang once again are on an investigation, of what the Evil Masked Figure's plans could be, followed by finding out some clues as to who your parents killer is. But in order to solve this mystery, it will involve defeating a group of monsters, who are brought to life, by the costumes from cases you have solved in the past. Will you uncover the mastermind behind this Mystery? Will you be able to finally find the culprit who killed your parents? Or will you end up losing everyone you care about most? Read to find out.