Weevil Underwood Weevil Underwood , known as Insector Haga in the manga and Japanese version , develops into a rival and becomes jealous of Yugi Muto . He displays an adoration for insects , and as such his Deck is based on Insect - Type monsters . Design . Weevil ' s character design was overseen by Kazuki Takahashi . Weevil wears large round yellow glasses , which have an insect horn in the center to connect the lenses in season one ; in the other 4 seasons , his glasses have a beetle in the middle , and holes on the legs . His Duelist Kingdom glasses magnify his eyes ( or so it seems ) . His turquoise hair is arranged in a " Beatles ' Haircut " fashion , and his eyes are blue . In the Duelist Kingdom arc , Weevil ' s outfit consists of a green jacket with a raised collar , a white shirt underneath , a red bow tie , brown trousers , and brown shoes . From Battle City onwards he wears a closed green jacket with a beetle pattern on the front , black shorts , and green - and - black sneakers with wing shoe laces . He carries a KaibaCorp Duel Disk on his left hand . In the Waking the Dragons arc he has a Chaos Duel Disk instead . Weevil does not appear in the first series anime . However , his character and appearance are supposedly based off of the character Haiyama , who appeared in one episode of Season 0 ; they both wear yellow glasses , have colored hair , and are manipulative . Voice and mannerisms . In the Singapore English dub , Weevil speaks with a - esque voice . Etymology . His Japanese given name " Haga " ( 羽蛾 ) literally means " Winged Moth " , referring to his first ace monster , " Great Moth " . It can also be played on the word " Hakazu " ( 剥がす ) which means " to peel off " , referring to the many types of insects that go through molting during their life cycle . His title " Insector " refers to his Insect Deck . His English given name comes from " Weevil " , a small beetle with an elongated snout . Many types of said insect are also pests of crop , referring to his less than pleasant personality . His surname , " Underwood , " is played on " under the wood " , possibly to compliment his Insect Deck . In the Spanish version ( where he is dubbed by David Robles , who also voices Duke Devlin ) , he is named Weevil Underwood , but in the first episode a narrator mentions that his nickname is " El gusano peleón " ( the fighting worm ) , from that point on everybody refers him as " El gusano " ( the worm ) . Biography . " Yu - Gi - Oh ! " . Duelist Kingdom . Weevil starts out in the series as the Duel Monsters Representative of Eastern Japan , and then National Champion of Duel Monsters ( in the dub , he was Regional Champion ) by defeating Rex Raptor in the final match of the National Championship . After his victory , he is invited personally by Maximillion Pegasus to travel to Duelist Kingdom to compete there . Upon meeting Yugi and his friends , he seemed a humble and respectful person , in contrast to the bold and arrogant Rex Raptor . However , he quickly revealed himself to be underhanded and sneaky ( while Rex Raptor , ironically , shows decent sportsmanship and plays fairly ) . On the boat ride to the tournament , he confronts Yugi Muto and asks to see his set of Exodia . Upon seeing them , Weevil takes them and chucks them off the boat , leaving Joey Wheeler to jump in to retrieve them . Laughing , Weevil returns to his cabin , confident that he has destroyed his major source of competition . Yugi defeats him in the first duel of the tournament , forcing Weevil to be the first duelist to leave the island along with the others who had been defeated in their first round . Battle City . Weevil is next seen in the Battle City arc , where he duels Joey , after " paying " a boy to plant a " Parasite Paracide " card into Joey ' s deck . Despite using this to his advantage , he loses and is forced to give Joey his rare card , " Insect Queen " . As a result of losing , he is ejected from the Battle City tournament . He is later seen observing the semifinal match between Yugi and Kaiba in Domino City among other duelists . Waking the Dragons . In the Waking the Dragons arc , Weevil and Rex are together , having lost a great deal of their former popularity after they had been humiliated in the the Duelist Kingdom and Battle City tournaments . However , they soon meet and duel Gurimo ; as a result of losing , both of them have their souls taken . They were later granted their freedom after Yugi Mutou defeated Gurimo . The two of them follow the group until Yugi ' s soul is taken by Rafael after Yami Yugi loses to him . They beg Rafael to take them with him , and he grudgingly accepts their pleas . He and Alister take them to Dartz , and the two of them beg for more power to settle old scores . Dartz decides to test them by seeing if they could each grasp a piece of the Orichalcos Stone , with the penalty for failing being their souls taken again . Both of them succeed , and they improve their decks with cards from Dartz ' s massive collection . Weevil then proceeds to confront Yugi and duels him , with " The Seal of Orichalcos " empowering his insects . In the end , however , Yugi wins anyway , and Weevil ' s soul is taken by the magic of the very Seal which he has employed . His virtually comatose body is found by Ironheart when the train on which he had previously been dueling with Yugi derails and falls off a cliff , and he is transported to a hospital . When Dartz is defeated , Weevil ' s soul is released from imprisonment , and he wakes up in his hospital bed in the same room as Rex , who leaves with him . Grand Championship . Weevil and Rex ' s next plan was to enter the KaibaCorp Grand Championship , where they both impersonated the duelist Fortune Salim . They were quickly defeated by Zigfried von Schroeder and sent back to Japan by KaibaCorp . ( In the dub , their fate after the Duel is unknown , although they were briefly seen after Yugi defeats Leon von Schroeder , possibly in Domino City , watching in disgust , indicating that they were sent back . ) Dawn of the Duel . Their last attempt at revenge was to steal Yugi ' s Egyptian God Cards from his house , where they mistakenly grabbed Yugi ' s bag containing all of his Millennium Items . Yugi tried to stop them , but couldn ' t catch up . Meanwhile , while examining their prize , they were sent to the Shadow Realm by Yami Bakura , who stole the Millennium Ring back from them afterwards . While Zorc ' s rampage over Ancient Egypt was in full swing , the events then were affecting the modern world as well - where Weevil was shown chasing his deck which was blown away by the wind . After Zorc ' s defeat , he was also seen . In the final episode of the Japanese version of the anime , Weevil is seen Dueling Rex after yet another argument . " Yu - Gi - Oh ! 5D ' s " . In " Yu - Gi - Oh ! 5D ' s " , a parody of him named Insector Hakata is listed as one the players defeated by Hunter Pace . Decks . Weevil uses an Insect Deck . His cards rely on " Insect Barrier " or " Cocoon of Evolution " to block opposing attacks while preparing to summon his strongest cards , " Great Moth " , " Perfectly Ultimate Great Moth " , and " Insect Queen " . Compared to other duelists , Weevil uses few Spell and Trap cards ; the ones he does use act to protect his insects or allow him to swarm the field with them .