Digimon Tamers, the third Digimon anime series that aired in Japan from 2001, introduced Matrix Evolution as the fusion of a human Tamer with their Digimon partner to reach a powerful Mega-level form. Moments like Takato merging with Guilmon to become Gallantmon became defining highlights of the series for longtime fans. Clips of the transformation cue have since circulated in fan edits, reaction videos, and meme compilations, where the brief, rising sound instantly signals a major upgrade. It remains popular because that fusion idea still reads clearly even to viewers who have never watched the show.