Ozzy and Strut make an appearance as they join Gideon’s herd. They become good guys instead of the bad guys that they were in the second film.
Ichy and Dil return as they retreat to The Great Valley as their original home, The Mists, becomes flooded to where dry land has become absent. They become Anti-heroes and they later befriend Littlefoot and his friends.
Petrie’s uncle, Pterano has been done with his exile and he becomes an anti-hero instead of being a an anti-villain that he was in movie seven.
Rinkus and Sierra return but they work for the leader of the Dark Leafeaters, Aark the Styracosaurus (Male).
Rooter, Bron, Ali, Tippy and his herd, Mr.Clubtail, Doc Skitter and Shorty make an appearance as well.
Hyp, Mutt and Nod meet a trio of teenage dinosaurs. They are Hespir the Hesperoynx (Female) Miri the Panoplosaurus (Male) and Machi the Kelumpasaura (Male). Hyp has a crush on Hotoma.
Cara the Diplodocus introduces Trevor to Cera. Cera and Trevor develop a crush on each other. Our heroes later find out that Cara is the granddaughter of The Lone Dinosaur (AKA Doc).
Loofah, Doofah and Foobie make an appearance as they form an alliance with the Gallimimus duo from the seventh film, Guido, Etta and Wild Arms to go on a rescue mission to rescue Cera, who’s later held hostage by the Dark Leafeaters. They convince the other yellow bellies, the Tinysauruses and some sharpteeth to join them on their rescue mission.
Cera runs away from her father, Topsy because he told her that he used to be a member of the Dark Leafeaters. Littlefoot, Ducky, Spike, Petrie and Ruby go into the Mysterious Beyond to look for Cera. Trevor the Triceratops (male), Alta the Amphicoelias (Female), Annetta the Edmontosaurus (Female), Spinus the Miragia (Male), Pterra the Pterodactylus (Female) and Gracie the Conchoraptor (Female) follow Littlefoot and his friends. Tio and his friends follow them as well. They run into a huge pack of small, feathered Sharpteeth which they manage to defeat them. (The Sharpteeth were in fact, Pyroraptors).
The Great Farwalkers and The Valley Dwellers think that the Dark Leafeaters took the young dinosaurs. They have Cree the Raven (Male) to search for their whereabouts. Cree later returns stating that they’re being held hostage by Blackclaw the Deinocherius (Male), Bash and Crusher the Stygimolochs (Both Male). They’re being heavily guarded by many other Dark Leafeaters.
Gideon’s herd and The Valley Dwellers form an alliance with Redclaw and a host of many other Sharpteeth of many sizes. (This is when Chomper comes back into the story. Amber and Valorie also come back as well).
Topsy works for Aark so he can later tell the others on how to save the young dinosaurs.
During the battle, Trevor gets a scar on the top of his frill to the far right. Big Daddy the Tinysaurus gets trampled to death by Bash the Stygimoloch, which then Skitter and Lizzie avenge Big Daddy with the aid of Cara by causing Bash to fall off a cliff. At the climax of the battle, a rockslide starts to fall towards the our heroes and villains which kills off Pterra’s mother, Aark, Blackclaw and a bunch of other Dark Leafeaters, Sharpteeth and Good leafeaters.
Cera tells Trevor that she has a crush on him. He also says the same as Cera.
Cera forgives Topsy for what he did in the past. Topsy also apologizes to Gideon for what he said about his herd. Gideon forgives him.
Everyone lives happily ever after. The End. Thanks for reading this!