Alright so we haven't had a cross gen evolution since Slyveon but what do you think is a cross gen evolution that truly elevated a Pokémon family line from bad to desirable?
My vote goes to Roselia's line
With Roselia gaining a pre evolution and especially an evolution, its line had become one of the best grass types to use competitively. It's evolved form Roserade is a great special attacker as well as great special defense, good moves set it can learn, and a decent amount of speed, Roserade truly elevated that line to become a true special powerhouse.
What about y'all?
My vote goes to Roselia's line
With Roselia gaining a pre evolution and especially an evolution, its line had become one of the best grass types to use competitively. It's evolved form Roserade is a great special attacker as well as great special defense, good moves set it can learn, and a decent amount of speed, Roserade truly elevated that line to become a true special powerhouse.
What about y'all?