The 20th Anniversary Shaymin is now available via Mystery Gift until the 24th

Additionally, some extra information about the recent new Pokémon has been revealed via the website:
- Iwanko, the Rock-type dog Pokémon, has been localized in English as
Rockruff- Nekkoala, the sleeping koala Pokémon, has been localized in English as
Komala- Zygarde's ability that changes its form is called
Power Construct and activates below 50% HP
- Drampa's ability
Berserk raises Special Attack when below 50% HP
- Charjabug's ability
Battery raises the Special Attack of its allies (I'm actually glad Vikavolt got Levitate over that)
- Tapu Koko's potential signature move
Nature's Madness halves the opponent's HP