First appearing in Pokemon Sun and Moon, Alolan forms of Pokemon are based on first-generation Pokemon, so it appears Niantic isn’t quite ready to introduce the fourth-gen monsters into Pokemon GO just yet.

Eighteen Gen-One Pokemon have Alolan forms, but it’s not yet known just which ones we’ll be seeing or how the release of them will work. The teaser image, as seen above, provides silhouettes of a decent number of these Kanto region inhabitants, so it’s probably safe to assume we could see them all at some point.

No specific release dates were mentioned – only that they’d be popping up in “the coming weeks” – but stick with GameSkinny for all the news, tips, and information on Pokemon GO you need. As always, let us know your thoughts in the comments below!