This theme comes from the Johto era of the Pokémon anime, the season that followed Ash's journey through Kanto and the Orange Islands and introduced the Johto region from the Pokémon Gold and Silver games. Its opening music became closely tied to that era for viewers who watched the series as children, and short clips have since circulated widely in edits, compilations and nostalgic posts. It remains popular because the melody is instantly recognisable and immediately evokes the excitement of starting a new Pokémon adventure.