This story is a sequel to G5 Adventures in The Jetsons and WWE: Robo-Wrestlemania

Spike and the rest of the dragons from the Isle of Scaly are coming for the annual Maretime Bay Summer Solstice Festival, celebrated with games, picnics on the beach, and a brand new tradition… the lighting of the Dragon Torch! But, just as the dragons arrive to kick off the festival, the Mane 6 find themselves on their most… prehistoric Unity Quest yet.

A relaxing spa getaway evolves into a prehistoric panic when Scooby-Doo, the gang and the Mane 6 uncover the horrible Phantosaur, an ancient legend that comes to life to protect hidden treasures buried in secret desert caves. 

But this scare-a-saurus doesn't stand a chance with Shaggy around, after he finds his inner hero with the help of some new-age hypnosis. Like, in fact, it makes him more brave and less hungry!

Together, with the help of a brand-new friend-- a dragon queen who has lost everything to poachers-- the ponies and their Mystery Inc friends gather a whole batch of colorful suspects, including a free-wheeling motorcycle gang, greedy corporate investors and overzealous scientists, revealing that there's more pieces to this mystery than slices in a pizza! Settle into your mud bath and let the Mystery Inc. gang and the Mane 6 unearth a ton of fun for the whole family!

(S3E10 of G5 Adventures)