Tristan Taylor is a close friend of Yugi Muto and Joey Wheeler. However, in Super Smash Bros. Crossover, Tristan is the first of Yugi's friends to be possessed by Nightshroud during Yugi's duel with Seto Kaiba, who was also possessed, and acts as an unwilling antagonist as a result. After Yugi unties his friends, only to get kicked off the building where the duel took place by Tea Gardner, who was possessed during the duel as well, Tristan's clothes change to those of Nightshroud and dons his mask as well. Tristan then tells Joey, who wasn't possessed, that the nightmare has just begun. Later, Tristan is seen carrying Ryo Bakura, who fled during the duel but hurt his arm in the process. Tristan is freed when Nightshroud is exorcised from Kaiba. During the second arc of Season 21, Tristan initially stays behind while the others go into the past in order to keep an eye on Bakura, but goes to the past when he realizes Tea is possessed by Yami Bakura.
Tristan's main appearance is based off his appearance during Battle City. After getting possessed by Nightshroud, Tristan's outfit changes to that of Nightshroud to signify his possession, though it changes back to hide this.