In Yu-Gi-Oh, but Mechanical Ascension (1-148).

Summary

A boy in a purple coat, known as "Hai Xing Tou," and his friend Cheng Zhi Nei rush to a card shop to witness a duel. They encounter a girl named Zhen Qi Xing Zi, who points out that You Feng, a boy with a history of bad luck in card games, is surprisingly holding his own against card hunters with a high-rarity "Electronic Dragon." Cheng Zhi Nei is determined to help You Feng recover his stolen cards. As the duel progresses, You Feng performs a fusion summon, creating the powerful "Electronic Ultimate Dragon" with an attack power of 4000. The card hunter, initially confident, underestimates You Feng's strength. Despite the hunter's defenses, You Feng's dragon attacks and defeats the hunter's monster, resulting in the hunter losing all his life points. The onlookers, including Muto Yugi and others, are left astonished by the outcome.

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