The phrase comes from Sailor Moon, the manga and anime series created by Naoko Takeuchi in the early 1990s. As Usagi Tsukino, the heroine uses her Moon Prism brooch to transform, shouting the command that became one of the franchise's most quoted lines. Clips of the first transformation circulated widely in anime fandom, AMVs and later on social media, where the short call became shorthand for any magical change. Its lasting popularity reflects both nostalgia for classic shoujo anime and the universal appeal of a transformation moment.