Ep. 22: Yuugi and Kaiba duel on the castle roof to determine who faces Pegasus
Aired on September 19, 2000

Upon reaching Pegasus' castle, Yuugi and his companions encounter Kaiba. He challenges Yuugi to a duel, asserting that victory grants him the right to confront Pegasus and attempt to recover Mokuba's soul. The battle takes place on the castle roof between the two duelists. During the match, Kaiba devises a strategy to combine his three Blue-Eyes White Dragons into a single entity known as the Blue-Eyes Ultimate Dragon. This confrontation serves as a critical step in the ongoing conflict regarding Mokuba's fate and access to Pegasus.
Episodes
- Ep. 18 · Jonouchi struggles against Kotsuzuka's regenerating zombie monsters in the arena
- Ep. 19 · Jonouchi's group trapped in cave, Yuugi and Jonouchi duel Meikyuu Brothers
- Ep. 20 · Yuugi and Jonouchi face separation in the maze while Kaiba infiltrates Pegasus' castle.
- Ep. 21 · Yuugi and Jonouchi defeat the Gate Guardian to obtain star chips for Pegasus' castle
- Ep. 22 · Yuugi and Kaiba duel on the castle roof to determine who faces Pegasus
- Ep. 23 · Yuugi faces Kaiba's devastating trap and ultimate dragon while drawing strength from friends and family
- Ep. 24 · Yuugi and Kuribou weaken Kaiba's Blue Eyes Ultimate Dragon in a high-stakes duel
- Ep. 25 · Yuugi's depression after losing star chips to Kaiba leads Anzu to duel Mai
- Ep. 26 · Yuugi Enters Pegasus Castle as Kaiba Faces the Creator in Duel Part One