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'''Rex Raptor''', known as '''Dinosaur Ryuzaki''' (ダイナソー竜崎 ''Dainasō Ryūzaki'') in the Japanese version, is a character in the ''[[Yu-Gi-Oh! (anime)|Yu-Gi-Oh!]]'' anime. He is a [[Dinosaur]] [[Duelist]]. Despite his introduction as a powerful Duelist, he becomes a source of humiliation along with his companion, [[Weevil Underwood]], after suffering defeat to [[Joey Wheeler]], and begins considering Joey his rival for this reason. Alhough Although Rex is vindictive, arrogant, and tyrannical, he plays fairly.