In Heartland City, Yuma Tsukumo aspires to be the world's best duelist. Despite this, he is not a good duelist, since he usually loses to others. When he ends up Dueling Shark, a bully known to have pro-level skills, odd things begin to happen and Yuma's story begins.

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It's a dueling disaster for Yuma when a mysterious visitor from another galaxy suddenly appears, putting his duel with Shark in serious jeopardy!

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When the city is thrust into chaos after several of its computers become infected by a malicious virus, Yuma and Tori set out to find the culprit!

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Yuma must figure out a way to outduel his math teacher Mr. Kay before his life points are completely subtracted and the virus planted in the city's computer system goes... viral!

When fellow classmate Flip offers Yuma an Xyz Monster, Tori and Bronk literally flip out and warn Yuma to stay clear of this two-faced trouble maker - a task that turns out to be easier said than done!

Yuma must figure out a way to defeat Flip or risk losing his Utopia card... and Astral forever!

When Nelson Andrews, star of the hit TV series 'The Sparrow,' becomes possessed by a Number Card, Yuma challenges him to a duel, putting Astral's safety on the line!

Yuma must figure out a way to defeat The Sparrow and his powerful Galaxy Queen before Nelson and Astral disappear forever!

In order to find his missing friend Tori, Yuma must face off against a feline fanatic who has the purr-fect answers to his every move!

Yuma discovers that Shark has started running with the wrong crowd and given up dueling. Can Yuma hook Shark back into battling, or are Shark's dueling days done forever?

When Yuma learns that Shark is going to be set up to take the fall for stealing a priceless deck, Yuma challenges Shark's thug friends to a duel! Can Yuma put a stop to The Pack's thieving plan and save Shark's skin, or will these thugs prove too powerful?

Yuma and Shark's tag team battle against The Pack reaches a fevery pitch, for if Yuma loses, he also loses Utopia!

Yuma and Astral face their toughest battle ever when they are forced to duel a mysterious individual who hunts Number Cards!

Kite overpowers Yuma with Galaxy-Eyes Photon Dragon, as Yuma desperately tries to turn the Duel around.

The legendary Dark Magician and Blue-Eyes White Dragon come out of retirement when a wise old man named Master Roku challenges Yuma to duel!

After challenging Master Roku's former student to a duel, Yuma relies on his master's teachings in order to defeat the evil Kaze and save the Duel Sanctuary's Legendary Deck!

When a mysterious fortune teller agrees to help out Yuma's friends, they soon find themselves in a terrifying situation that no one ever saw coming! Can Yuma rescue his pals, or will the all-knowing Fortuno see to it that Yuma doesn't succeed?

Yuma must figure out a way to defeat the mysterious and all-knowing Fortuno if he wants to save his friends, his Number Card and his soul!

While on the way to School Spirit Day, Yuma realizes the Golden Key his father gave him is missing. As Astral and Yuma retrace his steps, Yuma shares the exciting story behind the Golden Key's origins!

When Yuma gets into a fight with Bronk, their friendship is soon put to the u ltimate test when an evil Number Card takes control of Yuma!

When Orbital 7 crashes into Lillybot, it's love at first sensor! So when he discovers his beloved bot is in trouble, he motors to free her from her tormentor... Yuma!

Shark tries to stop Kite from stealing Yuma's Golden Key by challenging him to a duel! Can Shark sink his teeth into Kite's life points and save Yuma's prized possession, or will Kite's cunning skills sink any chance Shark has of winning?

With his Golden Key in Kite's possession, Yuma must hunt down the Number Hunter if he ever wants to see Astral again!

While Yuma continues to search for Astral and the Golden Key, Astral continues to search for a way to defeat Kite and save all his Number Cards!

When an unexpected phenomenon stops time, Kite is able to gain the upper hand by tapping into Astral's memories and witnessing firsthand the battles that he and Yuma have fought together.