I just realized that Mudsdale is outsped by Gastrodon and only beats out Shellos by 1 point... this gen lol
This is why Speed is super important. When you can't even outspeed walls, you straight up can't 2HKO them.
Pokedex entries change with like every game anyway, someone probably decided to have a little fun with the anniversary game and go full edgelord lol
They've actually been endlessly recycled since Gen IV. The reason why people are excited because these are brand new entries.