The hungry friends help themselves to some fish, only to discover that they have been lured into a trap by Mako Tsunami, the master of the Sea Deck/.

Yugi's classmate Bakura, possessed by his Millennium Ring's dark powers, traps Yugi and his friends in a Shadow Game where they become the cards themselves!

Pegasus punishes Yugi using the same Toon Deck and mind-reading abilities he used on Kaiba. As Pegasus turns Yugi’s monsters against him, Yugi loses the will to battle. Will Pegasus capture Yugi’s soul into a card, just like Kaiba?

It’s time for the endgame! After discovering the location of Dartz’s secret base in the middle of the ocean, our heroes are on their way to stop Dartz once and for all –with the entire navy as their escort! However, Dartz’s island is magically guarded with thundering maelstroms and tornadoes that prevent anyone from approaching! Can they reach Dartz before he resurrects the lethal Grand Dragon Leviathan from its millennial slumber?

It’s the brawl for it all! All the monsters of Earth join forces with the survivors of the monster domain for an epic showdown against Grand Dragon Leviathan with the fate of both worlds hanging in the balance! But the tide of battle is turning against our heroes as Grand Dragon Leviathan unfurls gruesome tentacles to snatch Yugi and his crew and absorb them into its body!