In this animated adventure, the Mystery Inc. gang finds themselves at a science expo where they encounter a giant robotic dog causing chaos. As they delve deeper into the mystery, they must navigate through a series of technological challenges and uncover the truth behind the mechanical menace. The film features the beloved voices of Frank Welker, Matthew Lillard, and Mindy Cohn, bringing the iconic characters to life. Directed by Michael Goguen, this installment offers a blend of humor and suspense, appealing to both young audiences and long-time fans. For those interested, the movie can be viewed for free on 123Movies / Movies123.