The Rare Hunter, named Seeker in the English version of the Dungeon Dice Monsters video game and unnamed in anime and manga, was a member of Marik's Rare Hunters organization. In the English version Seeker would often comment on a duel for a rare card is like a hunt, explaining his strategy of replacing cards is like replacing weaker hounds with better ones.
Having been called in by one of their contacts (the shopkeeper that sold Joey and Yugi their Duel disks) Seeker and other minions ambushed Joey Wheeler and forced him into a Duel. Most of the duel, he played cards in Defense Mode, and used Graceful Charity to draw more cards. Joey kept up a constant offensive and initially did well (however, he gave up a chance to win the Duel with multiple monster attacks by tributinng them to summon Red-Eyes Black Dragon), but Seeker was able to draw all 5 pieces of "Exodia" and claim an automatic victory. Upon his defeat, Seeker and the goons took Joey's "Red-Eyes Black Dragon" and beat him up.
At the opening of the Battle City Tournament, Joey tracks down Seeker without his robes, claiming he is able to identify him by his snake-like eyes. When Joey demands a rematch, he declines due to his lack of rare cards. The exchange catches the attention of Yami Yugi, who duels in place of Joey, wagering his prized "Dark Magician". Joey tried to warn Yami of the Rare Hunter's strategy, but Yugi refused, believing it to be an unfair advantage (in the English dub, Seeker claimed that he would tear up the "Red-Eyes" if Joey told). Yami figured it out on his own later, and used cards that would prevent Seeker from holding all the "Exodia" pieces in hand, and finally destroyed Exodia by baiting Seeker into summoning Exodia's head, allowing him to use "Chain Destruction"). Lacking the will to continue the duel now that he doesn't have any cards that can secure victory for him, Seeker gives up and the Duel goes to Yugi. Yugi also discovered that the Rare Hunter was using fake cards, and he destroyed them (in the dub, the cards were real, but marked with invisible ink).
At that moment, Seeker began writhing in pain; Marik had established mental contact with Seeker and wasn't too pleased that he lost. Using the Millennium Rod, Marik took over Seeker and used him as speaker to talk to Yugi. He stated that this Rare Hunter was the weakest of his minions and warned Yugi of future duels before making Seeker fall unconscious (in the English dub, the Rare Hunter's mind was banished to the Shadow Realm).
Waking the Dragons
Seeker appeared as one of the many lost souls that sought revenge on Yami when he entered the Stone Wasteland to find the spirit of Yugi.