>>28068824based on this list, the remaining viable possible Alolan forms (fully evolved) are:
>Butterfree>Raticate>Fearow>Arbok>Nidoqueen/king>Clefable>Wigglytuff>Vileplume>Parasect>Venomoth>Dugtrio>Persian (pretty much confirmed already via Meowth)>Golduck>Primeape>Poliwrath>Machamp>Victreebel>Tentacruel>Golem>Rapidash>Farfetch'd>Dodrio>Dewgong>Muk>Cloyster>Hypno>Kingler>Electrode>Hitmonlee/chan>Weezing>Seaking>Starmie>Mr. Mime>Jynx>Ditto>Vaporeon>Jolteon>Omastar>Kabutops>Snorlax>Legendary birds>Mewalso fixed slightly. Gengar appeared in at least one of the trailers and Lickitung evolves into a gen 4 Pokemon.