With the use of a light, its revealed to be Marcy who was behind all this. The real Stanton appears behind the group, as Scooby licks the imposter, tasting mubber. Scooby defeats the Pterodactyl and returns to Stanton. Stanton voice is heard over microphone, and the gang with Jed go to confront him, only to have to battle Pterodactyl. The gang head back to Monstrous Fright and Magic to confront Stanton, finding Jed inside a the Beast of Bottomless Lake costume where Stanton trapped him when he learned he was no good. Stanton, who put them on a wild goose chase. Velma asks where is his partner who gave him the mubber costume, revealing that all chains of events go back to Mr. The Chief Security Guard Joseph Grim is revealed to be the Caveman, using bumping oil machines to gain petroleum. The gang battle the Caveman, defeating him.
Scooby later finds a contract from Stanton and gives it to Velma, as Fred and Daphne are trapped in a cage, but are freed by Scooby in his archer costume. Saving Shaggy, Scooby finds a large bone in the tar pit. There, the gang learn that the Caveman haunts the museum and a Pterodactyl takes Shaggy when giving Scooby a drumstick, promoting Scooby to save him again. Nikki gives the gang information on where to go - Natural History Museum. Velma tells Scooby to smell his costume, revealing it to be mubber as Alvin tells the gang that he was not given name, but a change of revenge. Nikki Starlight reveals herself as the real Guitar Ghoul, not wanting her career effect her life. The Guitar Ghoul is revealed to be Alvin, as Velma tells them that his band that was not successful, blaming himself and became jealousy of the real Guitar Ghoul. Regrouping, the Guitar Ghoul mocks the gang, as Scooby finds his location and defeats him. Afterward, Daphne is trapped in a cage and is saved by Scooby in another costume.
After a scare from the Guitar Ghoul, the two meet Nikki Starlight who was Guitar Ghoul's girlfriend. In time, Shaggy falls down a slide, promoting Scooby to save him. Scooby finds clues that tell of disturbing events (rides going havoc, animatronics chasing people). Velma tracks the voice to the Rock 'n' Roller Coaster Land where the gang meet Alvin Wiener who tells them that the famous Guitar Ghoul is haunting the amusement park. Maggie Xi cackles and disintegrates into mubber, with a male voice telling them they "can't catch what they can't hold!" Though Fred knows that the voice might be Jed, he remains in disbelief. Defeating Zen Tuo, its revealed to be Maggie Xi in the costume, as Velma admits she gave it away when disappearing into the sewer entrance when they first met, using the dragon as a distraction. Scooby finds clues and goes down a sewer to track Zen Tuo, saves Shaggy and Daphne and battles Zen Tuo's dragon.
Going to Chinatown, the gang meet Magal "Maggie" Xi who warns them of the powerful Zen Tuo before disappearing when a dragon roar is heard. Scooby and the gang explore different areas in search of Jed. Winslow Stanton tells them Jed is a thief and has stolen his mubber and animatronics. Once they get there, Jed is missing, and his animatronics have gone haywire. Scooby-Doo and the gang are visiting Fred's cousin Jed at his factory Monstrous Fright and Magic or M.F.M. In the Nintendo DS game, there are a few minigames included to make use of its touchscreen. This is the third Scooby-Doo game to feature a laugh track. Without using these costumes some levels may not be possible to finish. Scooby-Doo can change costumes which can give him different moves such as kung-fu and fly like a bat.
The player uses Scooby-Doo to take down enemies and collect clues for Velma. Scooby-Doo! Unmasked is the first Scooby-Doo! game released on various console platforms in 2005. Nintendo DS, Game Boy Advance, GameCube, PlayStation 2, Xbox