"The Mystery of the Planet Series!!" is the fifty-sixth chapter of the Yu-Gi-Oh! GX manga. It was first printed in Japanese in the V Jump magazine and in English in the Shonen Jump magazine. Both of which were printed in volume 8 of the Yu-Gi-Oh! GX graphic novels afterwards.
Adrian tells Jaden that he won't beat "Uranus" with his weakling monsters. Jaden brings out "Masked Hero Dark Law" and uses "Double Attack (Team Strike)", with allows his "Masked Heroes" to attackas one. This defeats "Uranus". As Adrian's Life Points drop to zero, he remembers his his brother. He needs to graduate from the academy to become a professional Duelist, which would pay for his brother's operations. Principal MacKenzie had promised to immediately recommend any American students that defeat the Japanese students for a pro league contract. Jaden is surprised that nothing happened to Adrian after the attack, so he determines that it wasn't a Shadow Duel, despite the dark aura generated by "Uranus". Seeing Adrian's somber expression he realizes that he had no intent on taking "Winged Kuriboh".
Adrian walks away, and is suddenly confronted by Principal MacKenzie in the forest. MacKenzie tells him that he's entertained him long another, and that he'll take back the card. Adrian finally recalls that MacKenzie had given him the card in the first place. Adrian is engulfed in darkness and falls unconscious. At the beach, Syrus waits for his opponent. Jesse arrives, sliding in while chasing a dragonfly, which he identifies as an oniyanma. Jesse is surprised that his opponent is "Kaiser's little brother", but he then apologizes for calling Syrus that. Syrus responds that it's alright - he's proud of his brother and aspires to beat him. They begin their Duel.
Turn 3: Syrus
Syrus Normal Summons "Zweiroid" (700/1000) in Attack Position and activates its effect, discarding a card to increase its ATK by 1000. "Zweiroid" attacks "Needle Honey Bee", but Jesse activates his face-down "Wing Stream", preventing its destruction in battle (Jesse 3700 → 3000). The effect of "Needle Honey Bee" decreases the ATK and DEF of "Einroid" (0/1500 → 0/800) and "Zweiroid" (1700/1000 → 1000/300) by 700 .