Shougo Aoyama

From WikiFic

Shougo Aoyama is a minor character who appears in Toei's Yu-Gi-Oh movie. He appears to be younger than Yugi and the others, although he is about as tall as Yugi is, and has large green hair. Shougo is a cowardly duelist who declares himself the best after he acquires the Red-Eyes Black Dragon. The card is stolen by Seto Kaiba, who is organizing a tournament for the sole purpose of dueling Yugi again. However, Jounouchi retrieves the card and puts it in Yugi's deck, but Yugi won't use the card until Shougo gains the will to duel. Once this happens, Yugi fuses the Red-Eyes with the Meteor Dragon to create the Meteor Black Dragon, which destroys all of Kaiba's monsters.

Shougo is seen dueling during the end-credits of the movie, but hasn't been seen since.