Dinosaur King
Dinosaur King

Therizinosaurus is famous for having the longest claws of any known land animal, at 1 m (3.3 ft). They were first thought to be turtle ribs, hence its species name "cheloniformis", or "turtle-form".

General Statistics[]


full-sized Therizinosaurus

  • Name: Therizinosaurus cheloniformis
  • Name Meaning: Scythe Lizard
  • Diet: Herbivore
  • Length: 9-10 meters (30-33 feet)
  • Time Period: Late Cretaceous (70 MYA)
  • Classification: Therizinosauria --> Therizinosauridae
  • Place Found: Mongolia
  • Describer: Maleev, 1954

Dinosaur King Statistics[]

Arcade Stats[]

Therizinosaurus Card

Therizinosaurus arcade card (Japanese Kakushin 3rd Edition, hidden)

  • Attribute: Secret
  • Sign: Rock
  • Strength: 2000
  • Technique: 1000
    • Compatibility: All Tabs
  • Attack:
    • Rock (Critical): 620
    • Scissors/Paper: 540
  • Types:
    • Counter Type (Japanese/English/Taiwanese 2007/Series 2/New 3rd Edition; Japanese Secret Egg cards)
    • Defense Type (Japanese/English/Taiwanese 2007/Series 2/New 4th Edition)
    • Tie Defense Type (Japanese Kakushin series)
    • Revival Type (Fossil) (Japanese Kakushin 6th Edition)
  • Arcade Nickname:
    • Japanese: 巨大な鉤爪
  • Secret Moves:
    • Claw Blade (Rock): Slash the opponent with glowing extended claws!
    • Gyro Claw (Scissors): Spin and rake the opponent with your claws!
    • Dangerous Claw (Paper): Toss your opponent and impale them as they fall!
  • Super Moves Occurrence Condition: After playing the same move twice
  • Altered Form: Super Therizinosaurus


Anime Stats[]

Therizinosaurus card

Therizinosaurus anime card

Move Cards[]

Gyro Claw
Therizinosaurus spins around like a top and moves in on its opponents, its long claws slashing at everything!
Claw Blade
Therizinosaurus' claws project even longer energy claws that it slices its opponents with!

DS Stats[]

Theri intro

Therizinosaurus DS battle intro

  • Elemental Attribute: Mystery (Secret)
  • Critical Move: Rock
  • Rarity: 6 Question Marks
  • Battle Type: Counterstrike Type
  • Fossil/Move Set: None (? if Normal Moves, only Secret Super Moves)
    • Locations: (unobtainable)
  • Users:
    • (None)
  • Encyclopedia number: Ex
  • Special Acquisition: It was likely only obtainable by a downloadable Stone Circle code (however, the game's Eoraptor fossil contains Therizinosaurus' claws, which might suggest that it is also obtainable as a Fossil).
  • Other: Unlike Deinonychus, it was never distributed, so the only way to get it is by using a cheat code. Like all Secret Dinosaurs in the game except Eoraptor, it can only use its own Secret Moves and Alpha Moves. It is one of the Dinosaurs with the off-pattern stats shared between Anime and Secret Dinosaurs.

TCG Stats[]

Therizinosaurus TCG card

Therizinosaurus TCG card

  • Element: Secret
  • Icon: Scissors
  • Power: 1500
  • Level: 4
  • Life: 2
  • Card Code: DKDS-044/100, DKDS-094/100
  • Card Rarity: Gold Rare, Colossal Rare
  • Image From: Ep. 28 anime scene
  • Abilities:
[Giant Slayer] This Dinosaur gains +700 Power while it's battling a level 7 Dinosaur.
(This Dinosaur can use Super Moves of any Element. It must still meet any other requirements.)


Dinosaur King[]

Just like Pachycephalosaurus, Therizinosaurus was raised as a child by Dr. Z at an unknown point during Dr. Ancient's mission. Dr. Z pushed him (exceedingly) hard to make him as strong as he could be, something that made him hate Dr. Z.

In Daddy Dearest, Dr. Z dreamt about him one night, so he sent the Alpha Trio to Tokyo (determined by fortune-telling dinosaur bones) to find and bring him back home. His card was embedded directly in the limestone wall of a building in the shopping complex where the D-Team were for their school exercise; when light off a nearby window reflected to produce a rainbow, it activated and smashed out of the wall, Therizinosaurus shining with the same bright light as Pachycephalosaurus. Dr. Z and Seth arrived immediately in a hot air balloon, but Therizinosaurus quickly destroyed the cage they'd brought for him after remembering Dr. Z's treatment, his disloyalty surprising Dr. Z; he then went on a rampage throughout Tokyo, ending up on the TV station's rooftop. Dr. Z tried convincing him to come home, but he lashed out and backed away in fear, and as Dr. Z started realizing his mistakes when raising him, the Alpha Trio summoned their dinosaurs. Therizinosaurus quickly knocked Tank off the building and dispatched Spiny and Terry with Gyro Claw, but fled from the arriving police and cameras, jumping onto the wall of another building and climbing up.

Pet-sized Chomp bit onto his tail to follow, Ace and Paris breaking windows to pull Therizinosaurus inside, allowing Chomp to be summoned to his full size. However, Therizinosaurus used Claw Blade, one-shotting Paris and Ace and knocking Chomp down to a critical energy level. Dr. Z confronted Therizinosaurus again, this time reminding him of the fun times they'd had playing tag and finally convincing Therizinosaurus to accept him, the doctor jumping onto his face to hug him. Unfortunately, this extra weight tipped Therizinosaurus off balance, and he fell forward out the window. Chomp ran up and grabbed his tail, but couldn't hold him, both dinosaurs falling from the building. Chomp returned to his card in midair, Therizinosaurus cradling Dr. Z to protect him and returning to his card when he hit the ground. Despite this, the card fell onto a bush to be retrieved by Max as Seth escaped with Dr. Z. Back at Zeta Point, Dr. Z swore to get him back one day.

In Dinosaur War!, Max gave his card to Jonathan along with the other Secret Dinosaurs, who took them to the battle against the Black T. rex, where Rex summoned him. Therizinosaurus used Gyro Claw in the Super Fusion Move that defeated the Black T. rex after the third hit.

Character Design[]


Therizinosaurus personality is strongly influenced by his past, because Dr. Z trained him hard and subjected him to cruel experiments to turn him into a Secret Dinosaur. This led to a severe trauma, which caused him to react with fear and aggression to Dr. Z. Like all Secret Dinosaurs from Dr. Z, he is a strong fighter and maybe even the most powerful of them, as he easily defeated five of the six main dinosaurs and also greatly weakened Chomp without suffering damage himself. He also seemed to be in better control of his power than Pachycephalosaurus and Megalosaurus because he showed no signs of self-exhaustion or reckless destruction. Despite his trauma, he later warmed up to Dr. Z and accepted him back when the professor reminded him of the happy moments they had together, and the good intentions he'd had, after realizing how bad he'd made life for the dinosaur with the rest of his methods for raising it, making Therizinosaurus the only Secret Dinosaur who (definitely) did this. In the end, this went so far that he risked his own safety to save Dr. Z's life when they fell out of the skyscraper window, showing his capacity for forgiveness.


  • Dr. Taylor's arcade comments:
    • Japanese: 前足に大きなかまのようなつめを持っている。つめの長さは70センチくらいあった。
    • English: Has large, scythe-looking claws on front feet. The claws are about 70cm long.
    • Taiwanese: 在前腳有著像大鐮刀一樣的爪子。爪子的長度有70公分之長。
  • DS Game Encyclopedia entry: A dinosaur with scythe-like claws on its forelimbs that are over 70 cm (2 feet) long.
  • It was the third Secret Dinosaur to appear in the arcade.
  • In the DS game, it is one of the dinosaurs that has never been distributed, along with Pachycephalosaurus, Megalosaurus, Fukuisaurus, Fukuiraptor, Charonosaurus, and Gastonia.
  • Along with Pachycephalosaurus and Deinonychus, it was one of the available dinosaurs in the Japanese Secret Egg I card.
  • It is the 20th Dinosaur Card available as a Fossil Card.
    • Deinonychus, Therizinosaurus, and Pachycephalosaurus were the only Secret Dinosaurs that were available as Fossil Cards.
  • In Daddy Dearest, Dr. Taylor stated Therizinosaurus was part of the same family as Tyrannosaurus and Albisaurus. In actuality, it was only related to Tyrannosaurus by being a coelurosaur (a far larger group than a taxonomic Family, an actual scientific term with a strict definition), and Albisaurus isn't even a dinosaur. Dr. Taylor may instead have meant to say "Abelisaurus", a ceratosaurian theropod, but ceratosaurs aren't closely related to coelurosaurs except by being theropods, which make up half of one of the two main dinosaur branches.
  • When chibi Therizinosaurus appears in the memories of Dr. Z in Daddy Dearest, instead of being black and white like its full-sized self, it was dark blue and white.
  • It and Pachycephalosaurus were the only Secret Dinosaurs that were not defeated by another dinosaur.
  • Therizinosaurus was the only Secret Dinosaur to eventually (and clearly) accept Dr. Z as its "father", or any authoritative figure, though not at first.
  • When Dinosaur King was still airing, there was a website where you could catch dinosaurs in your own Dino Holders. Strangely, the website depicted Secret Dinosaurs as having one of the six regular Elements. Therizinosaurus was shown to have the Fire Element, thus extending the range of the Fire Dinosaurs to include some therizinosaurs, though how it would be expected to use Fire Moves, many of which utilize the user's supposed-to-be-large jaws, is unclear (perhaps it uses its claws instead?).
  • Therizinosaurus, along with Allosaurus and Suchomimus, is one of the few dinosaurs from season 1 that did not appear in season 2 at all, while Stegosaurus only appeared altered.
  • In the arcade game, although the Therizinosaurus card appeared for the first time in the 2007 3rd Edition, it is possible to play it in the first two versions (original and Operation: Dinosaur Rescue) of the arcade with a different barcode.




Dinosaur King Arcade Game 恐竜キング - Therizinosaurus the Secret Dinosaur VS the Alpha Fortress -Easy-

Gameplay by SockWave DK


p · e · t Secret Dinosaurs
Normal: Apatosaurus/Brontosaurus · Cryolophosaurus · Deinonychus · Eoraptor · Megalosaurus · Pachycephalosaurus · Pawpawsaurus · Therizinosaurus
Main: Brontikens · Cryolophosaurus
Altered/Armored: Brontosaurus/Armor · Deinonychus/Armor · Therizinosaurus/Super