Although they came close to victory, the brothers were defeated when Dark Yugi and Jonouchi's "Black Skull Dragon", powered by "Copycat" mimicking the brothers "Ryoku", defeated their "Gate Guardian". With their victory, Yugi and Jonouchi obtained enough Star Chips to qualify for the tournament's final rounds. However, the brothers had another test that Yugi and Jonouchi needed to pass. They informed them that one of two doors was the true exit. The brothers claim that from then on, one of them would speak only lies, while the other would speak only the truth. Dark Yugi realized that both brothers were lying and tricked into admitting this via the use of a two-headed coin. He and Jonouchi were then able to move on.