The Pokemon Centers in Japan will be releasing 5 more Transform Ditto plushies on December 23, 2017.
Each plushie will also have a matching smaller mascot plush keychain version.
In addition there will be 6 more Transform Ditto gashapon figures as well. These figures will only be sold in vending machines inside the Pokemon Center for a very limited time.
Omanyte & Ditto
Dragonite & Ditto
Sableye & Ditto
Lapras & Ditto
and Magikarp & Ditto.
These will all be very popular and should sell out fast, but you can always get them on Pokevault while supplies lasts.