Question: how to unlock characters in yugioh world championship 2004?
Answer: Beat Bakura, Mai, Joey, Ishizu, and every Ghoul ten times each. Beat Bakura, Yugi, Mai, Joey, and every tier 4 and tier 5 duelist 10 times each. Beat all tier 5 duelists 15 times each. Duel either Tea, Tristan, or Truesdale three times in a row and on the fourth time, Simon will be unlocked.