Young Shaggy befriends puppy Scooby-Doo and even gives him his name. They are bullied during Halloween. Velma Dinkley, Fred Jones, and Daphne Blake come to their rescue and solve a case in the process. They start solving cases together. Scooby becomes a target for an ancient quest. Scooby and Shaggy meet their superhero hero Blue Falcon while fighting off supervillain Dick Dastardly.
It starts as a modern origins story for the Scooby gang. I am getting a little tired of the name origin game but at least, Scooby Snacks make a lot of sense. I'm fine with doing a young Scooby gang movie. Scooby jr.'s voice sounds a bit old but otherwise, everything looks pretty good. It could have been a Monster House but then they grow up. The movie loses me as soon as Simon Cowell shows up. He's annoying in real life and in cartoon form. It turns into a supernatural superhero super-complicated movie. Are they trying to make a new Avengers cinematic universe? I don't know. I don't know what's happening anymore. Some of this is almost funny but mostly it's a convoluted mess. I wish that it's actually Simon Cowell. At least, that would mean that he gets locked away for life.