This results in the Mystery Machine being destroyed, much to Fred’s depression. Crane from the federal agents' truck, but he too is apparently eaten by the Giant Jackal Lantern. They come across the Sheriff, who freaks out and is gobbled up by the Giant Jackal Lantern, who is riding on the old Mystery Machine. The gang becomes separated into three groups: Fred, Velma, and Bill Nye in Mystery Machine X, Daphne and Elvira in Elvira's car, and Shaggy and Scooby with a father-daughter duo called Mike and Michelle. The Jackal Lanterns start chasing everybody, resulting in a long car chase. As Fred and Velma reach her, they see her being eaten and spit out by the Jackal Lanterns' giant master to become another monster herself. The Jackal Lanterns then come into the town and takes a female reporter with them. Fred is not so enthusiastic about it as he prefers the old Mystery Machine. Unfortunately, nobody seems to believe them, and they are chided for their actions by Velma.įred and Velma are approached by Bill Nye, who gifts them a modernized vehicle named 'Mystery Machine X'. gang members to inform them about the 'Jackal Lanterns' of the pumpkin patch. They quickly return to town and interrupt an ongoing interview of the other Mystery Inc. Smaller pumpkins start flying and starts chasing Scooby and Shaggy. Crane's fear formula turn to animated monsters. The pumpkins coming in contact with the mixture of toxic waste and Dr. On the way, they come across a stray disabled drone in a pumpkin patch with 'Tot Alli Frame' engraved on it and a truck full of toxic waste. Meanwhile, Scooby and Shaggy go to trick or treat as they think the mystery is solved. The gang finds out that the Mystery Machine was severely damaged while chasing Dr. Nevertheless, the mystery gang is hailed as heroes by everyone, including the Sheriff for drawing an end to the hauntings.

Crane tells Velma that his drones did not leak, thereby giving a hint that she missed something in her reasoning. Before being pulled away by the federal agents, Dr. As everyone starts panicking, Scooby-Doo and Shaggy shoot down the drones by using Halloween candies as projectiles. While Velma explains how she solved the mystery by tracing a fan mail sent to Elvira by Crane and measuring gas leakage in the air, gas drones carrying fear gas canisters set up by Crane appears in the sky. the Scarecrow, a former escapee convict of Arkham Asylum. The gang unmasks the Haunted Scarecrow as Dr. gang are in a covert operation in Elvira's Halloween of Horrors Parade in Crystal Cove to capture the Haunted Scarecrow.

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