Super Secret Number Card Investigation Club The Super Secret Number Card Investigation Club , S . S . N . I . C . or simply known as Numbers Club ( ナンバーズ · クラブ , " Nanbāzu Kurabu " ) in the manga and Japanese version , is a club formed by Yuma Tsukumo ' s friends . In reference to its name , the club is established with the purpose of uncovering the mystery surrounding the " Number " cards without Yuma ' s help . History . Anime . The club was formed after Tori and the others become interested in finding information about the " Number " cards . This is due to them finding out about various Duelist s who were in the hospital , as they all seem to have been in the possession of a Number card . After questioning Yuma about the subject and him not giving an answer , the friends decided to investigate on their own . For that purpose , the group visited Fortuno , who ended up kidnapping them in order to lure Yuma and acquire his " Number " cards . Fortunately , Yuma defeated Fortuno and saved the Club . Later on , Bronk made membership cards for the five members . This drew the attention of Ray Shadows , who begged Bronk to be let into the club . He considered it , but was shot down by Caswell , who reprimanded Bronk for bringing outside objects to the school . When Caswell gave up his disciplinary ways , he received his card . Later on , the club argued on who should be their representative . This caused them to refuse to speak to each other the following day , to Yuma ' s concern . Under Girag ' s suggestion , he and Ray formed the Friendship Games to help them make up . However , this was really a ploy by Girag to steal Yuma ' s " Numbers " . Yuma ' s intent of making his friends get along again worked , but Girag brainwashed Tori and Cathy to steal Yuma ' s " Numbers " from him in the final round , but did not anticipate Yuma ' s partner , Shark , leaving the tournament early . As a result , he was forced to team up with Yuma to avoid his demise . They succeeded in defeating the girls , and Girag fled . When Yuma fell into a depression after losing Astral , the Club attempted to cheer him up , but failed . They decided to investigate Heartland Memorial Hall as part of their efforts , but they got captured by Mr . Heartland and Erazor , who stole their memories . Heartland informed Yuma about their capture , and coerced him to give him the " Numbers " so they could be freed . When Yuma refused , Heartland attacked him , but Trey saved Yuma . The boys teamed up in a Duel against Erazor . During the Duel , the Club started to cheer Yuma on , even though they had their memories stripped away , due to their strong bonds with Yuma . Thanks to the Club ' s support , Yuma and Trey defeated Erazor . Manga . After Yuma completely lost to Kaito , his spirit got broken . Kotori tried many things to cheer him up , but nothing worked . Then , Tetsuo came up with the idea of helping Yuma collecting the " Numbers " . With that , Kotori , Cathy , Tokunosuke , Takashi and Tetsuo form the " Numbers Club " . Later , due to information found by Tokunosuke , the Numbers Club , together with Yuma and Astral , go to the Heartland Theme Park to find " Numbers " . There , Yuma collected three " Number " cards . Later , the Club ' s headquarters is established in Cathy ' s mansion as an apology for the trouble she caused in the park . There , Cathy prepares a big room filled with researchers and big computers . Cathy explains that the room would be the headquarters , and from there , they can look up mysterious phenomena happening throughout the world , and therefore locate the " Numbers " . Also , after absorbing three consecutive " Numbers " , Astral explains he recovered some memories : his enemy is Dr . Faker , who plans on using the hidden powers of the " Numbers " to destroy the Astral World ; However , the Astral World is linked to this world , so if the Astral World dies , this one will die as well . The Numbers Club then decide to save the world from Dr . Faker . After that decision , the Numbers Club ' s members started using a new hero - style outfit and a helicopter ( provided by Cathy ) .