The electricity-less Pikachu in Pokémon Pokopia is called Peakychu.
Peakychu is a special Pikachu encountered during the story. Unlike the usual Pikachu expectation, this character has lost the ability to generate electricity, making the nickname and its personal situation part of Pokopia's collection of unusual Pokémon stories.
Pikachu is the franchise's best-known mascot and is normally associated with Electric-type attacks and its distinctive lightning-bolt tail. Peakychu stands out because the character's identity is built around the absence of that familiar power rather than an enhanced battle ability.
The name is easy to confuse with ordinary Pikachu because it changes only a few letters. In Pokopia, however, Peakychu is a named character listed alongside other special residents, including Smearguru the painter, Mosslax the plant-covered Snorlax, and Chef Dente the Greedent.