Pikachu was introduced in Pokemon Red and Green in Japan in 1996 and became the mascot of the franchise through the animated series that began in 1997. In the anime the character is voiced by Ikue Otani, whose repeated delivery of the name Pikachu created one of the most recognised voices in animation. Clips of that voice spread widely on forums, YouTube and soundboards as Pokemon grew into a global phenomenon. It remains popular because it instantly signals cuteness and nostalgia without needing any context or dialogue.