The xylophone trill is not tied to one movie or character, it comes from a basic playing technique where mallets alternate rapidly on the bars to sustain a shimmering tone. Orchestras and cartoon scores have used that technique for decades to signal magic, ice, stars or a sudden thought. Online, editors borrowed the clean recorded version as a ready made meme cue, dropping it into edits, animations and game clips whenever something sparkles, appears or transforms, and its short length makes it easy to reuse.