Scooby Doo 2: Monsters Unleashed

Fred, Daphne, Velma, Shaggy, and Scooby-Doo excitedly attend the grand opening of the Coolsonian Criminology Museum. The highlight of the event is an exhibit showcasing monster costumes from their past adventures as Mystery Inc.

During the festivities, the Evil Masked Figure crashes the event, causing chaos and threatening the gang. He steals several prized costumes, aided by the reanimated Pterodactyl Ghost, deepening the mystery surrounding their sudden arrival.

In the aftermath of the attack, a smear campaign against Mystery Inc. is orchestrated by journalist Heather Jasper-Howe. This drives Shaggy and Scooby to prove their worth and solve the mystery themselves.

Determined to uncover the truth, Shaggy and Scooby suspect a former adversary may be behind the chaos. They shift their focus to Jeremiah Wickles, the once-feared Black Knight Ghost and former cellmate of the deceased Jonathan Jacobo.

At Wickles' mansion, the gang discovers a grimoire that belonged to Jacobo. The book reveals secrets about crafting monsters, leading Shaggy and Scooby to uncover an invitation to a nightclub called the Faux Ghost.

Shaggy and Scooby, disguised for a stealthy exploration, infiltrate the Faux Ghost, a hub for unmasked criminals. However, their disguise is compromised, which results in their expulsion from the venue.

Meanwhile, Velma examines the grimoire and identifies a crucial component called 'randominium' that can be found in the old silver mines. This revelation sends the gang on a new path in their investigation.

As the trio of Fred, Daphne, and Velma, along with museum curator Patrick Wisely, rush to the museum, they are dismayed to learn that the entire exhibit featuring monster costumes has mysteriously vanished.

The gang finally confronts Wickles at the old silver mines, only to discover that his intention is to transform the mines into an amusement park, revealing that he is not their antagonist.

The gang locates the Monster Hive, a sinister facility where their beloved costumes are being transformed into real monsters. As Shaggy and Scooby inadvertently tamper with the machine, chaos ensues.

Amidst the chaos created by the machine, Shaggy and Scooby find themselves facing the 10,000 Volt Ghost. They manage a frantic escape, highlighting the dire situation the gang is ensnared in.

Retreating to their old clubhouse, the gang devises a plan to reverse the effects of the Monster Hive’s machine by adjusting the control panel's wiring. The stakes rise as they face further threats.

To counteract the rampaging monsters, each member of the gang splits off to distract them while Shaggy and Scooby are tasked with returning the control panel to the Hive. Their bravery is put to the test during this risky endeavor.

In the climax, the gang confronts the Evil Masked Figure only to be overpowered by the Tar Monster. With Scooby being the only one free, he rises to the occasion and uses a fire extinguisher to subdue the beast.

In a shocking twist, the gang reveals that the Evil Masked Figure is actually Heather, who is secretly Jacobo in disguise. After capturing Jacobo and his accomplice Ned, the gang restores their reputation in Coolsville.

Following their heroic actions, the gang is celebrated in Coolsville for capturing Jacobo. The story concludes with a joyous celebration at the Faux Ghost, featuring guest star Ruben Studdard.