Grass as its only type, Kanto (Tangela)

Johto, Never appeared in the anime, has a pre-evolved form in gen 1 (porygon2)

Hoenn, Has both a pre evolution and an evolution in gen 4 (roselia)

Brock had this pokemon in the Sinnoh Region (croagunk)

Unova pokemon, became part fairy in gen 6 (Whimsicott)

Kalos, final evolution of a 3 stage line, Not a starter, the pseudo legendary, part flying type, or fairy type (Aegislash)

Alola, this pokemon is the biggest rival of both heracross and pinsir (according to the pokedex) (vikavolt)

Galar, Often caused trouble alongside Goh's Scorbunny (before the scorbunny was caught) (nickit)

Exclusive to Pokemon Scarlet, isn't a paradox pokemon (Armarouge)