From the Super Mario Wiki
Asia makes a first notable appearance in "7 Continents for 7 Koopas", from The Adventures of Super Mario Bros. 3. When Bowser tried to conquer the entire Real World, he put Bully Koopa under control of Asia. Bully vandalized the Great Wall of China by spraying graffiti all over it. Mario later stole Bully's wand, and turned the Wall into a giant dragon, who terrorized Bully.
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