Coliseum Clash is the 53rd episode of Dinosaur King, the 4th in Mesozoic Meltdown.
Chomp gets them out of the net and scares the villagers away. Jonathan tells Rex that a dinosaur just appeared, possibly one of the Spectral Space Pirates' Dinosaurs and go off to Rome, although it is revealed to be Terry, who was imprisoned by the Roman Army with the Alpha Gang in the last episode. Meanwhile, Foolscap returns empty handed to the ship, Gabbro laughing that he is still the best, but Shear reminds him that he is a big faillure, since he didn't get the stone either. Spectre sends Shear to get the Yellow Cosmos Stone. He then gives Gabbro and Foolscap (and Shear too) new dinosaur cards, since they lost their previous ones to the D-Team. Meanwhile, Helga and Dr. Z talk about the Element Boosters and Dr. Z is shocked when he realizes what Helga would look if he combined all the Element Boosters on Helga and starts cleaning up. At the same time, the D-Team arrive in Rome and learn about Terry, managing to sneak into the Coliseum. Sulla forces Spartacus to fight some lions later tonight, while Terry battles the Roman Army. However, Max summons Chomp to fight Terry. During the fight, Sophia finds Spartacus and gives him the Yellow Cosmos Stone. Chomp hits Terry with Lightning Strike before the Alpha Gang is rescued and recall Terry. Ursula, Zander and Ed leave to go after legendary pizza and Spartacus is recaptured, but the D-Team rescue Sophia. They get away, but are cornered by a dead end.
Roman Army/Alpha Gang vs. Max/ChompEdit
Max summons Chomp to help Terry, wanting to turn him into a card. He frees him, but knocks Chomp away too. Affraid that is Sula is going to capture them both, Chomp uses Lightning Strike, which weakens Terry.
Once free from their guards, Ursula recalls Terry, Max recalls Chomp, ending the battle.
- A rather long animation of Chomp and Terry battling is, minus a new camera angle or two, recycled almost exactly from Temple Tempest, featuring Chomp biting Terry's leg and being kicked away before getting back up, ramming Terry, and tossing him away. He then uses Lightning Strike, but it's different from there.
- This is the only episode of Mesozoic Meltdown not to feature a Space Pirate-controlled dinosaur (save recap footage and chibi Brontikens), as even the premiere before they met the D-Team showed Torvosaurus, while Yangchuanosaurus only shows up to break the cliffhanger at the beginning of next episode.