Pikachu is the mascot of Pokémon, the franchise launched in Japan in 1996 with its first video games and later turned into a long-running anime series. The character is famous for speaking mainly by repeating variations of its own name, so an exaggerated, drawn-out version is instantly recognisable even to people who have never played the games. Clips like this circulate on soundboards and in short-form edits because they compress that familiarity into a single joke, and the stretched delivery keeps it useful as a reaction sound long after the original episodes and games.