Starting on July 13th, 2018, the first Pokémon in the
Pokémon fit palm sized plush toy lineup will be available to purchase at the Pokémon Centers in Japan. The first 30 Pokémon will be available in July but by November 2018, the remaining 121 Pokémon will become available. 151 Kanto Pokémon to be available to buy and collect as part of this Pokémon fit series. Each plush toy costs 1100yen.
Source:
http://www.pokemon.co.jp/info/2018/07/180706_p02.html