Scooby-Doo! and the Beach Beastie

Shaggy is easygoing and snack-loving, but his mood shifts as Fred's net-obsession creates chaos on vacation. He leans on Scooby for comic relief while dealing with loneliness when Scooby spends time with another guest's dog. Throughout the seaside caper, Shaggy's humor masks loyalty, and he remains a steadfast friend who helps keep the group connected.

Fred Jones is a determined planner whose nets obsession pushes him to improvise a trap from video cassettes, turning technology into a detective tool. Scooby-Doo provides fearless support and comic relief, drawing the monster's attention and protecting the team as danger looms. Together with Shaggy, they illustrate the power of teamwork and become essential to catching the culprit.

Daphne Blake tries to keep the vacation calm, steering Fred away from nets and guiding the group toward safer spots like the lobby and the beach. She helps manage hotel guests' nerves and uncovers social dynamics at the seaside resort, including rivalry with Kurt and the Brownstones. Daphne's tact, empathy, and quick thinking help the team stay focused on the bigger mystery rather than personal frictions.

Velma Dinkley leads the investigative effort by following clues to Kurt's rival hotel and analyzing the attacks. Her logical approach helps separate theater from truth, revealing the necklace's deception and Grafton's plan. She coordinates with the others to piece together the motive behind the monster's raids and the financial scheme.

Kiki Brownstone, owner of the hotel dog, faces loneliness as Scooby bonds with her dog and Shana; she forms a connection with Shaggy and reveals a desire for companionship. Her necklace becomes a key plot point when it's revealed as fake, and she plays a role in confronting Grafton and seeking bail for him at the end. Through her vulnerability, Kiki adds emotional depth to the seaside mystery and highlights themes of trust.

Grafton Brownstone, head of Brownstone Industries, is revealed as the mastermind behind the necklace theft and the monster disturbances. His greed drives him to fake the necklace and plan a larger fraud, leveraging the hotel's chaos to hide his crime. His arrest marks the turning point in the mystery and restores order to the seaside community.

Kurt operates the rival hotel next door and toys with the chaos around the competition; his indifferent attitude to the mischief suggests he enjoys the spectacle more than solving it. He is a foil to Mystery Inc., providing humor and additional obstacles as repairs to the holographic water show lag behind. Ultimately, his role underscores a theme of rivalry complicating the pursuit of the truth.

Sandy Blake is Daphne's uncle and hotel proprietor whose seaside retreat forms the heart of the getaway. His establishment becomes a focal point for the mystery as guests arrive and leave, and his family ties complicate loyalties. The Florida setting centers around the hotel, its guests, and the tensions between hospitality and security.

Annette appears as a guest in the hotel, adding to the bustle of the beachside retreat. She contributes to the festive atmosphere and becomes a small piece in the mystery's social fabric. Her presence underscores how a vacation setting can amplify personal stories amid the larger caper.

The local Police Officer provides procedural support and coordinates with Mystery Inc. during the unfolding events. They help stabilize the situation as clues are gathered and the culprit is pursued. The officer's presence highlights collaboration between investigators and law enforcement in resolving seaside crimes.