The gang heads back to Monstrous Fright and Magic to confront Stanton, finding Jed stuffed inside a costume where Stanton trapped him when he learned of his plans. Stanton's voice is heard over a microphone, and he summons a giant Pterodactyl robot to battle them. Scooby defeats the Pterodactyl and reaches Stanton's location. The real Stanton appears behind the group; a UV light reveals that "Stanton" is Marcy in a Mubber disguise. Marcy tells them that she wanted revenge for Stanton taking all the credit on the creation of Mubber, which they both made together. Begging for forgiveness, Marcy and Stanton console and Stanton agrees to let her be a full partner in his company. The game ends with Shaggy making a Mubberwich (a sandwich with mubber); before he can eat it, Scooby uses the light to disintegrate it. Velma replies "Now that's what I call a "light" snack!" with the gang laughing, and another mystery solved.