Theres quite a few gen 3’s that I still haven’t even seen nearby. Lotad+evolutions (Its rained a few days here too and nothing), Carvanha & Sharpedo seems really rare, Wailmer (no raids I have seen yet but I only have like 2 gyms within 10 miles), Barboach+evolution (no idea why this is rare), Corphish+evolution (again pretty rare by me), Luvdisc and Feebas & Milotic.
I saw a Feebas nearby once, but I wasn’t in an area where I knew where every spawn point was so couldn’t find it. Hopefully I can hatch it out of a 10k soon. Been hatching a lot of Mareep lately.