>>333117190. There aren't going to be any new Alola Forms because they would be incompatible with Sun and Moon. This is different from ORAS' megas, the Therian formes because they can always revert back. Unique Pokemon - unbreedable, that can't be put in Wonder Trade, Pokemon Bank or the GTS (like Spiky Eared Pichu or Cosplay Pikachu, and inevitably Lycanroc-Dusk) are all one offs. You can't limit Alolan formes like that, so there won't be any.
