Pikachu is the mascot of the Pokemon franchise, first introduced in the video games in Japan in the 1990s and later made famous worldwide by the animated series. The character speaks almost entirely by repeating variations of its own name, with pika pika becoming its most recognisable sound. Short clips of that voice have circulated for years on soundboards, in fan edits and in meme videos, where the cuteness of the sound contrasts with unexpected moments. That contrast keeps it popular as a lighthearted reaction sound for Pokemon fans and casual viewers alike.