Dox A.K.A. Kyu in the Japanese version is one of the Paradox brothers; duelists who specialize in tag team matches. In the 4Kids English dub of the Yu-Gi-Oh! anime series the Paradox brothers speak in rhymes and have Chinese accents.
In the English dub of Yu-Gi-Oh! Duel Monsters by 4Kids Dox was voiced by Jerry Lobozzo. In Yu-Gi-Oh! GX Dox was voiced by Eric Stuart.