Connor Lacey's Adventures of Scooby-Doo 2 Monsters Unleashed

Connor Lacey's Adventures of Scooby-Doo 2 Monsters Unleashed  is the 24th YIFM/Scooby-Doo crossover made by Connor Lacey. It will appear on YouTube in the near future.

Plot
Mystery Inc. (Fred, Daphne, Velma, Shaggyand Scooby-Doo) attend the opening of an exhibition at the Coolsonian CriminologyMuseum commemorating their past solved cases with monster costumes on display. However, the celebrations are interrupted by a masked man known as the Evil Masked Figure who steals two costumes using the reanimated Pterodactyl Ghost. The gang are ridiculed by journalist Heather Jasper Howe, who starts a smear campaign against them. Concluding an old enemy is the mastermind, the gang revisit old cases, dismissing the former Pterodactyl Ghost, Jonathan Jacobo, due to his death during a failed prison escape, they guess that Jeremiah Wickles, the Black Knight Ghost's portrayer and Jacobo's cell mate in prison, is the culprit.

Going to Wickles' mansion, the group fall through a trapdoor and into a cage targeting unwelcome callers, but escape with the aid of Daphne's cosmetics. Inside, the gang find a book that serves as an instruction manual on how to create monsters. Shaggy and Scooby-Doo find a note inviting Wickles to visit the Faux Ghost nightclub. They are attacked by the Black Knight Ghost, but escape when Daphne fights him off while Velma discovers its weak spot and disables it. Before fleeing, the rest of the gang had previously discovered through the book found in Wickles' mansion that the key ingredient to creating the monsters was a substance called "randomonium", which can be found at the old silver mining town.

After Daphne helps Velma overcome her fears of intimacy and assert herself by changing up her image, Daphne, Velma and Fred go to the museum accompanied by the curator Patrick Wisely, but discover that the rest of the costumes have been stolen. Heather Jasper Howe ridicules the gang further by turning the city against them. The gang go to the mines, finding Wickles' plans to turn it into an amusement park. As they confront Wickles, he states that he and Jacobo were cell mates who hated each other, and denies any connection to the museum robberies.

Shaggy and Scooby, after overhearing the rest of the gang criticizing their tendency to bumble every operation, and especially their most recent offense in failing to secure the Pterodactyl Ghost at the museum, resolve to better themselves and become real detectives. Following the lead from Wickles' note, their first clue ever, they sneak into the Faux Ghost wearing disguises to try and solve the mystery. After speaking to Wickles, they learn he has resolved his ways. Scooby eventually causes a scene and his disguise falls off, leading Scooby and Shaggy to escape through a trash chute. On their way out, they spot Patrick uncharacteristically assaulting someone who appears to be a member of his staff, ordering him to find answers to who vandalized his museum. Escaping an awkward interaction with Patrick, Shaggy and Scooby spot Wickles leaving the club and follow him.

The gang then find the Monster Hive where the costumes are brought to life as real monsters. Shaggy and Scooby play around with the machine's control panel, bringing several costumes to life, and the gang flee with the panel as the Evil Masked Figure terrorizes the city. Escaping to their old high school clubhouse, the gang realize they can reverse the control panel's power by altering its wiring. Captain Cutler's Ghost emerges from the bayou, forcing the gang to head back to the mines, encountering the various monsters along the way. Velma sees Patrick in the mines, finding a shrine dedicated to Jacobo built by Patrick, but Patrick proves his innocence by helping Velma after a catwalk unexpectedly gives way under her.

The gang confront the Evil Masked Figure, but the Tar Monster captures and attempts to drown all of them, but Scooby escapes, and uses a fire extinguisher to freeze the Tar Monster's body. He reactivates the control panel, transforming the costumes back to normal. The gang take the Evil Masked Figure to the authorities, unmasking him as Heather. When asked why Heather did what she did, Velma suddenly pulls and peels Heather's face off, revealing she is actually Jacobo in disguise; Jacobo had actually survived the fall from the prison wall, and sought to get revenge on Mystery, Inc. by discrediting them. Jacobo's cameraman Ned is also arrested as an accomplice.

Mystery, Inc. are praised as heroes once again in Coolsville. In the Faux Ghost, the gang celebrates their victory with the now reformed criminals, whom they unmasked in the past (including Wickles).

Trivia