As previously mentioned, the Pokemon Centers in Japan will be releasing 7 Rainbow Rocket Pikachu plushies on January 20th, 2018.
And more great news!!! The Pokemon Center will also be releasing each of the trainer Pokemon plushies as well.
Giovanni & Mewtwo (Team Rocket)
Maxie & Groudon (Team Magma)
Archie & Kyogre (Team Aqua)
Cyrus, Dialga & Palkia (Team Galactic)
Ghetsis, Reshiram & Zekrom (Team Plasma)
Lysandre, Xerneas & Yveltal (Team Flare)
Guzma & Golisopod (Team Skull)
These will be available on Pokevault on January 20th. These will surely be popular, so they will go fast. Lots more Rainbow Rocket merchandise will also be available.