Episode Title:Knight of the Secret Stone! Fusion User Episode Description:Zuzu is still having doubts about Yuya's identity. She steps up against LID's Fusion specialist Julia Krystal. Julia quickly summons her fusion monster known as Gem-Knight Topaz. Zuzu destroys it with her Melodious monsters. Julia performs a graveyard fusion to summon her ace monster, Gem-Knight Master Diamond. Julia uses Gem-Knight Topaz's effect to deal extra damage to Zuzu. Zuzu attempts to grab an Action Card, but is led astray by a reflection and ends up losing the match. Not feeling interested in participating in the final match, Sora nominates Yuya's friend, Gong, to go up against LID's Synchro user Kit Blade. As the match begins, Kit brings out two Synchro Monsters known as X-Saber Souza and XX-Saber Gottoms.