Peakychu is a special Pikachu character in Pokémon Pokopia.
The game includes several named or unusual Pokémon encountered during the restoration journey. Peakychu is identified as a Pikachu who has lost the ability to generate electricity. That condition gives the character a role distinct from an ordinary wild Pikachu and makes Peakychu part of Pokopia’s story of damaged habitats and Pokémon needing help.
Pikachu is one of the franchise’s best-known Pokémon and is commonly associated with electric attacks. Peakychu’s situation therefore stands out because it removes a defining ability from a familiar species. The name is a character name used in Pokopia, not a separate species or an evolution.
Peakychu can be confused with Raichu, Pikachu’s evolution, or Pichu, its pre-evolution. Neither is the answer to this question. Peakychu is specifically a Pikachu appearing as a special character in Pokémon Pokopia.