The sound comes from Pokemon Red and Blue, released for Game Boy in the late 1990s, with Pokemon Yellow following as an enhanced version featuring Pikachu. The level up jingle was part of the games' core feedback loop, heard hundreds of times during a playthrough as teams grew stronger. As retro gaming clips spread on YouTube, TikTok and soundboards, the effect escaped its original context and became a universal shorthand for leveling up in real life, from fitness progress to exam results and job promotions.