Dinosaur Ryuzaki (Rex Raptor in the 4Kids dub) is a minor recurring antagonist in the Yu-Gi-Oh! anime series.

About Dinosaur Ryuzaki

Rex Raptor plays a deck focusing on dinosaur type monsters, though his mightiest monsters are dragon type. He is the runner-up in the regional championship, losing the final round to Insector Haga. He is not a cheater like Weevil but is a jerk all the same.

However, the last seasons of the anime adaptation portray him as a joke easily dispatched by the villains and willing to sell his soul to get revenge on Joey Wheeler. They also portray him as Weevil's best friend and partner in crime, something much less apparent in the manga.

Waking the Dragons

In Season 4, Waking the Dragons, Rex and Weevil attempted to steal Yugi and Joey's rare cards, but were challenged to a duel by Gurimo, who beat them and took their souls. They were released after Yugi defeated Gurimo. Rex and Weevil snuck aboard during Yugi's trip over to Pegasus' castle in the hopes of finding rare cards and tried to get an Orichalcos card from Rafael, becoming two of Dartz's henchmen after hitchhiking aboard Rafael's helicopter. Rex dueled Joey in a train station as revenge for taking his Red-Eyes and was defeated. His soul was taken by the Orichalcos and was released when Dartz and the Orichalcos God were defeated.

Grand Championship

In the first half of Season 5, Grand Championship, Rex and Weevil entered Kaiba's tournament as one duelist and dueled Zigfried von Schroeder, who easily defeated them with his Valkyries.

Dawn of the Duel

In the second half of Season 5, Dawn of the Duel, Rex and Weevil stole Yugi's Millennium Items and Egyptian God Cards (only going after the latter) but ran into Dark Bakura, who knocked them out (temporarily trapped their souls in the Shadow Realm in the 4Kids dub) and returned the cards and items to Yugi. They suffered a lot of the consequences of Zorc ravaging the past but survived it all.

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General
Yu-Gi-Oh!
Dark Yugi | Shadi | Seto Kaiba | Mokuba Kaiba | Yami Bakura | Maximillion Pegasus | Croquet | Pegasus' Guards | Duke Devlin | Marik Ishtar | Yami Marik | Odion Ishtar | Mr. Ishtar | Weevil Underwood | Rex Raptor | Paradox Brothers | Bandit Keith | Sid | Bonz | Zygor | Panik | Gozaburo Kaiba | Thief King Bakura | Jinzo | Diabound | Zorc Necrophades
Rare Hunters
Arkana | Strings | Seeker | Lumis and Umbra
Big Five
Gansley | Crump | Johnson | Nesbitt | Lector

Television Only
Yu-Gi-Oh! Duel Monsters
Noah Kaiba | Zigfried von Schroeder | Leon von Shroider | Imitator of Death | Witty Phantom
Doma
Dartz | Rafael | Alister | Valon | Gurimo | The Great Leviathan

Yu-Gi-Oh! GX
Vellian Crowler | Jean-Louis Bonaparte | Pierre the Gambler | Zane Truesdale | Lorenzo |Howard X Miller | Frost | Thunder | T-Bone | Dr. Eisenstein | Princess Rose | Prince Ojin | Brron | Zure | Kozaky | Chaos Sorcerer | Mr. Shroud | Trueman | Mad Dog | Sartorius Kumar | Sarina Kumar | The D | Light of Destruction | Thelonious Viper | Trapper | Adrian Gecko | Echo | Yubel | Supreme King | Guardian Baou | Skilled Dark Magician & Skilled White Magician | Three Masked Knights | Jinzo | Sacred Beasts | Chaos Sorcerer | Sky Scout | Skull Knight
Shadow Riders
Kagemaru | Nightshroud | Camula | Tania | Don Zaloog and The Dark Scorpions | Abidos the Third | Titan | Amnael

Yu-Gi-Oh! 5D's
Rex Goodwin | Roman Goodwin | King of the Netherworld | Kalin Kessler | Devack | Greiger | Sayer | Professor Frank | Mr. Armstrong | Z-one | Don Piero | Lester, Primo, and Jakob | Lazar | Aporia | Rudolph Heitmann | Carly Carmine | Misty Tredwell | Lawton | Barbara | Malcolm | Radley | Earthbound Immortals
Dark Signers
Rex Goodwin | Roman Goodwin | Devack | Greiger | Kalin Kessler | Misty Tredwell | Carly Carmine
Iliaster
Z-one | Aporia (Lester, Primo, & Jakob) | Paradox | Vizor

Yu-Gi-Oh! Zexal
Don Thousand | Dr. Faker | Mr. Heartland | Number 96 | Quattro | Nistro | Vetrix | Triad of Terror (Wolfsbane, Coyote, Jackal) | Parker | Quinton | Erazor | Chironex | Scritch
Seven Barian Emperors
Vector | Reginald Kastle/Nash | Rio Kastle/Marin | Alito | Mizar | Dumon | Girag

Yu-Gi-Oh! Arc-V
Leo Akaba | The Doktor | Barrett | Silvio Sawatari | Yuri | Jean-Michel Roget | Sergey Volkov | Lucas Swank | Z-ARC

Yu-Gi-Oh! Vrains
Varis | Specter | Dr. Kogami | Faust | Baira | Dr. Genome | Pandor | Queen | Shepherd | Bohman | Harlin | Lightning | Windy | Roboppy | Ai
The Knights of Hanoi
Varis | Specter | Dr. Kogami | Faust | Baira | Dr. Genome | Pandor

Toei
Aileen Rao | Kekeru Goyu | Tetsu Trudge

Movies
Anubis | Paradox | Diva

Manga Only
Mr. Karita | Yako Tenma | Mr. Clown | Ahmet | Tragoedia | Luna | Leo

Card Games
The Lswarm | The Construct | Tierra | Trishula, Dragon of the Ice Barrier

Video Games
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