Pikachu is the electric mouse mascot of Pokemon, the Nintendo and Game Freak franchise that began with the video games in 1996 and grew through the long running anime where Ikue Otani voices Pikachu. Clips of Pikachu screaming have circulated for years on soundboards and in meme edits because the character normally only repeats its name. The extended aaaa version became a reusable reaction sound online, shared for panic, pain and over the top fear moments in gaming and anime edits.
About this sound
Pikachu aaaa sound effect of the Pokemon mascot screaming, used in memes, videos and edits when a character panics, screams or reacts in shock.
This is a short clip of Pikachu letting out a long, high pitched aaaa scream that stretches for several seconds. The voice starts cute and familiar, then turns into an exaggerated wail that feels both panicked and funny at the same time. Because Pikachu is normally cheerful and limited to saying its own name, hearing it scream like this breaks expectations instantly. The rising panic in the sound makes a normal moment feel like a meltdown, which is why viewers recognise the joke even before they see what is happening on screen.