>>54164606Yes, all fossil Pokemon gens 1 through 6 (excluding Aerodactyl since that's from an NPC on Poni Poni island) are available on Akala island in Konikoni City.
There's an NPC that sells fossils (one a piece per customer) in Olivia's jewelry shop. Then said fossil you bought has to be taken to the fossil restoration center on Alola Route 8.