A Duel Disk
A Duel Disk (デュエルディスク Dyueru Disuku) is a piece of Dueling equipment attached to the left forearm within the Yu-Gi-Oh! franchise. They were first manufactured by KaibaCorp as a portable form of Dueling Arenas used in the early part of the Yu-Gi-Oh! second series anime. They use a portable hologram generator to display Duel Monsters cards and in the case of the Mark 1, the player's hand. Cards that are played are placed on the Duel Disk's blade. Since their introduction in the anime and manga, they have become a fundamental necessity among Duelists.
Ikran's F-Zero timeline[]
The Duel Disk was often used by Yugi/Yami and Joey, though it was soon given to Tinsel during the events of Cold as Ice. Sadly, it was too big for her arm, which constantly slipped and caused some strain, even spilling her Cards! There was a second Duel Disk, more skinnier, which was a well-fit for her while she used it during the race in Outer Space, Meteor Stream. However, as Yami/Yugi and Joey were facing the Seal of Oracholas and Dartz, she quit and soon gave it away.
Still, the main heroes use it, till Deathborn's defeat.