This is a list of all Pokémon that are not available within any of the Generation 7 titles. If you want to use any of them, you'll need to transfer or trade. :
Pokemon Generation 1 tier list by Fluttershyfan18 on DeviantArt
Ranking All 7 Pokemon Generations – The Strong Style Smark
Generations Card List - Pokemon TCG - DigitalTQ
Legendary Pokémon - Bulbapedia, the community-driven Pokémon encyclopedia
Pokemon Generation 2 Shiny Tier List - YouTube
Pokemon Generations tierlist : r/pokemon
My Pokémon Generation 1 Tier List | Hypixel - Minecraft Server and Maps