Pokémon Sleep has so far been the drowsiest Pokémon spin-off game, but today the mobile title revealed a collaboration with the Pokémon Horizons anime for the game's third anniversary. A trailer launched for the crossover, confirming that elements from each will be crossing over with the other, including an appearance by Professor Neroli in the anime! Pokémon Sleep x Pokémon Horizons: The Series Collaboration Trailer For Pokémon Sleep , Captain Pikachu will appear in the game alongside the debut of Tinkatink and its evolution. Previously released Pokémon that feature in the anime will also gather. The collaboration runs in-game August 17-24. On the anime side, Professor Neroli will appear in  Pokémon Horizons  in the August 21 episode in Japan, which will be released internationally later . In Japan, Neroli will be voiced by Natsuki Hanae, who is best known as the voice of Tanjiro Kamado in Demon Slayer: Kimetsu no Yaiba . The current  Pokémon  anime, titled  Pokémon Horizons: The Series   in English, features the first new protagonists in the franchise's history and premiered in Japan on April 14, 2023, with Saori Den directing at OLM. The series  premiered in English  in the UK on BBC iPlayer in December 2023 and in North America on Netflix on March 7, 2024.