Super Secret Number Card Investigation Club

The Super Secret Number Cards Investigation Club, simply known as Numbers Club (ナンバーズ·クラブ Nanbāzu Kurabu) in the 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.

Manga
After Yuma completely lost to Kaito, his spirit got broken. Kotori tried many things too 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 an 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, and Koron-chan joined the Club.

Later, the Club's headquarters is established in Cathy's mansion, as an apology for the trouble she caused in the park. There, she prepares a big room, with researchers and big computers. Cathy explains that the room would be the headquarters, and there, they can look up mysterious phenomenons happening throughout the world, and therefore, locate the "Numbers".

Members

 * Tori Meadows
 * Bronk Stone
 * Flip
 * Cathy
 * Caswell

Manga Only

 * Koron-chan