Pikachu has been the mascot of Pokemon since the franchise began, and its squeaky voice is instantly recognisable from the games and the Super Smash Bros series, where it shouts short battle cries during fights. On user-made soundboards, a tiny snippet of that voice began circulating as a shock meme because listeners hear it as an adult insult coming from a famously cute character. It spread through meme edits, reaction videos and gaming clips, where the humour comes from that mismatch rather than from the line itself. It remains in use as a brief, deliberately jarring reaction.