Card Professors Guild

The Card Professors are a group of 13 duelists who appear in Yu-Gi-Oh! R, they are selected specifically by Yakou Tenma to stop Yugi's ascent to the top floor of Kaiba Corporation. They are each defeated fairly easily, one (Cedar Mill) is even defeated in a single panel.

A fourteenth card professor, Masumi Momono appears in the special chapter of R. In it, he attempts to take over the Kame Game Shop owned by Sugoroku Mutou, and, like his predecessors, is defeated.