- Species: Triceratops
- Attribute: Lightning
- Power: 2000
- TCG: 2500
- Technique: 700
- Sign: Scissors
- Owner: Sheer (Spectral Space Pirates)
- Debut: The Haunted Hunt
- Dinosaurs Defeated: Terry, Paris, Tank
- Other: Maximus can use Spectral Punisher in this form. This is the only form of Maximus seen in the anime. Maximus was the first of the Space Pirates' main dinosaurs to be defeated, though by less than a minute before Gigas.
- Spectral Punisher (Jark Punisher)
- Maximus throws the opponent into the air, then shoots a thin beam that slices them. This move defeated Terry, Paris, and Tank.
- Lightning Master
- This Dinosaur can use all Lightning Super Moves.
- Spectral Stun
- All Dinosaurs battling this Dinosaur lose all their abilities until the end of the turn.
He first appeared in The Haunted Hunt, summoned when Sheer was looking for the Green Cosmos Stone. He fought against Paris, but was knocked away by Terry when he joined the battle. Maximus defeated Terry with Spectral Punisher and nearly defeated Paris as well, but when she ate the Green Cosmos Stone, she gained immense power and knocked him into a wall. She defeated him with Ultimate Leaf, but Sheer reclaimed his card, and later that same episode, he attacked the D-Team, but they were rescued by Jonathan.
He reappeared to fight Paris again in The Forestfire Effect, but was recalled when the volcano erupted. In The Search for the Last Cosmos Stone, he fought against Cryolophosaurus, but was frozen in place by Blizzard Smash.
In Clash for the Cosmos Stones he defeated Terry and Paris with Spectral Punisher and was supercharged by the Dark Pterosaur. He then used Spectral Punisher to defeat Tank in Fate of the Cosmos, but was defeated by the combined power of Chomp's Lightning Strike, Ace's Sonic Blast, and Paris's Emerald Garden. What happened to his card after that is unclear.
|p · e · t||Main Dinosaurs|
|D-Team:||Chomp (Max) · Ace (Rex) · Paris (Zoe)|
|Alpha Gang:||Terry · Spiny · Tank|
|Spectral Space Pirates:||Brontikens (Spectre) · Gigas (Gavro) · Armatus (Foolscap) · Maximus (Sheer) · Eocarcharia (Goma)|
|Seth:||Saurophaganax · Black Tyrannosaurus · Cryolophosaurus|
|p · e · t||Lightning Dinosaurs|
|Normal:||Achelousaurus · Albertaceratops · Anchiceratops · Arrhinoceratops · Brachyceratops · Centrosaurus · Chasmosaurus · Diceratops · Einiosaurus · Eucentrosaurus · Monoclonius · Pachyrhinosaurus · Pentaceratops · Styracosaurus · Torosaurus · Triceratops · Udanoceratops · Zuniceratops|
|Altered/Armored:||Achelousaurus/Armor ·Anchiceratops/Armor · Anchiceratops/Super · Arrhinoceratops/Alpha · Brachyceratops/Super · Chasmosaurus/Alpha · Chomp/Super · Diceratops/Armor · Diceratops/Super · Einiosaurus/Alpha · Eucentrosaurus/Super · Maximus · Maximus/Armor · Pachyrhinosaurus/Armor · Pentaceratops/Armor · Pentaceratops/Black · Torosaurus/Super · Triceratops/Alpha · Triceratops/Armor · Triceratops/Super|
|Main:||Chomp · Maximus|