Ikue Ōtani provides Pikachu's voice in every language of the Pokémon animated series.
Unlike most characters in internationally dubbed animation, Pikachu's voice was kept consistent around the world. Ōtani records Pikachu's vocal lines and its familiar name-based cries, allowing the character's sound to remain recognizable across different dubs.
Pikachu generally speaks by repeating its own name rather than using ordinary human sentences. This helped make the character's voice understandable to viewers regardless of language, while also preserving Pikachu's identity across the franchise's games, television productions, and films.
Viewers sometimes confuse Pikachu's performer with Ash's voice actors, who differ by language and production. Ōtani's role is specifically the Japanese-originated Pikachu performance that is retained internationally.