Return to the Spirit World (1) - S1.E18

The first round of the Fortune Cup is over, but Rex Goodwin is holding a consolation match, which opposes Professor Frank (Known simply as The Professor in the English version) versus the real Luna, much to Leo's disappointment. Not only Luna is reluctant to duel, but the duel itself is planned to uncover Luna's signer ability. Furthermore, Professor Frank has a stirring speech that sends Luna into a trance-like state, disrupting her dueling capabilities.