Chumley Huffington Chumley Huffington , known in Japan as Hayato Maeda ( " Maeda Hayato " ) , was initially a Slifer Red Duelist with an extremely pessimistic outlook but gradually grows to become a respected card designer for Industrial Illusions . Design . Appearance . Chumley ' s character design was overseen by Kenichi Hara . His usual outfit consists of the standard Slifer Red uniform , though its colors are inverted to include a larger section of white than red . His face , build , and hairstyle were made to resemble a koala . As conceived , the character was very muscular , but his muscle tone is removed from the dub to make him appear obese . He carries a Duel Academy - issued Duel Disk on his left hand . Personality . Chumley is portrayed as a lazy and gluttonous Duelist who could never win a Duel and hated exercising . Though a loyal friend , he was never really into putting himself in any danger , being a very reluctant participant . However , he would prefer his friends over any amount of grilled cheeses . He eventually turns from a lazy flunky to a respected card designer working with Maximillion Pegasus . Voice / Mannerisms . In the dub , Chumley is obsessed with grilled cheese sandwiches . It is said at one point he creates a Grilled Cheese Spell Card . His obsession with the food leads him to use phrases such as " lischus " and " not lischus " as positive and negative assurance respectively , the words being derived from " delicious . " In one episode , it is implied that he speaks French . Abilities . Chumley has the same power to hear and see Duel Spirits that Chazz Princeton and Jaden Yuki have , although he is not totally aware of it . His Spirit Partner is " Des Koala " and he is pictured with it several times . Biography . Chumley was forced to retake his freshman year after he failed his first time around . His best friends , Jaden Yuki and Syrus Truesdale , come to Duel Academy , and encourage Chumley to gain more confidence in himself . Throughout the series , Chumley participates in only two Duels : the first against his father , Mr . Huffington , and the second against Dr . Crowler . His father believed that his son ' s efforts at Duel Academy were wasted and that he would be better off leaving . To put an end to the conflict , Chumley struggled valiantly against his father ' s special tactics , but ultimately lost . Despite this , he allowed his son to continue his studies , as he saw that Chumley had actually learned something , and that his friends would always support him . Maximillion Pegasus offers Chumley a job at Industrial Illusions as a card designer nearing the end of the first year after he wins a card - design contest by creating " Ayers Rock Sunrise " . In order to determine whether or not he will be permitted to leave the school , Crowler Duels with him in one final test . Although Chumley manages to hold his own , even getting the chance to play the first card of his own creation , " Ayers Rock Sunrise " , he is again defeated . Crowler , however , lets him move on regardless , impressed by how far in his studies he has come . Chumley returns with Pegasus during the Genex Tournament to give Jaden a new card , " Skyscraper 2 - Hero City " , to aid him in his Duel with Franz , a fellow card designer who stole the only remaining copy of " The Winged Dragon of Ra " from Industrial Illusions . Chumley , along with Belowski , is shown during Honest ' s flashback of Professor Banner ' s class in episode 176 . Deck . Chumley uses an Australian Deck , sporting cards such as " Des Koala " , " Des Kangaroo " , and " Eucalyptus Mole " , all of which reflect his affinity toward such animals , including his favorite card , " Big Koala " . His strongest monster , " Master of Oz " , and one of its fusion components , the aforementioned " Des Kangaroo " , were given to him by his best friends Jaden Yuki and Syrus Truesdale respectively .