A few of these Pokémon, as a result of new evolutions, become a part of evolutionary families with [[List of Pokémon with branched evolutions|branched evolutions]]. Pokémon which evolve into a Pokémon of a previous generation, instead of from it, are always [[baby Pokémon]].
Later generations have modified old families by introducing [[regional form]]s of older Pokémon adapted for life in different regions. Certain families entirely consist of variant forms while others share an unevolved state before diversifying, much like a branched evolution. Certain Pokémon will only evolve from a specific regional
variant and, therefore, have no counterpart.
==[[Kanto]]-based evolution families==