Bandit Keith

Bandit Keith is a duelist in Yu-Gi-Oh!

Duelist Kingdom
Bandit Keith was the intercontinental champion, but lost a duel to Maximillion Pegasus, who read his mind, and has been seeking revenge on him since. He and his henchmen, Bonz, Sid, and Zygor, entered Pegasus's tournament Duelist Kingdom, and took Joey into a duel arena in a cave where Bonz dueled Joey while Keith was giving him instructions. Joey won, so Keith beat up Bonz, Sid, and Zygor, taking their star chips so he had ten star chips and could enter Pegasus's castle for the finals.

In the semifinals, Keith dueled Joey, whom he picked on almost as bad as Kaiba did, but did not have either of the two entry cards, so he stole Joey's card. He was shocked when Joey turned up with a card (given to him by Mai, who had lost the previous duel to Yugi), and cheated during his duel with Joey by keeping cards to power up his slot machine beneath his wristband, but in spite of this, Joey won. He tried to disqualify Joey by saying the card wasn't his, but his knowledge of this revealed that he stole Joey's card, and Pegasus pointed out his cheating in the duel, and ordered Keith taken away. Keith threatened Pegasus, who hit a switch, ejecting him from the island.

Battle City
Keith was found by Marik Ishtar and his Rare Hunters, and Marik controlled him using his Millennium Rod. While posing as a fortuneteller, the possessed Keith took Yugi's Millennium Puzzle and dueled Yugi over it. He was released from Marik's control by Yami Bakura, and as Marik attempted to regain control, Keith attempted to fight him off, causing a fire in the warehouse in which they were dueling. Keith escaped the fire when Joey and Tristan opened the doors (and were disgusted to find out that they rescued Bandit Keith).

Waking the Dragons
Keith was never seen following his time as Marik's mind slave, except as a lost soul in Season 4, Waking the Dragons, as a lost soul alongside those of Panik, Seeker, the Paradox Brothers, Arkana, and Yami Marik, however, as most of them (aside from Panik, Seeker, and Yami Marik) were neither dead, in the Shadow Realm, nor taken by the Orichalcos, it is likely that this was just an illusion.