Welp, I've gone and done it.
>>53063882 inspired me to make a Gen 1 romhack that adds Popplio and Brionne. I would add Primarina but there's no everstone in Gen 1, so for now I have left her out.Now the question is, should I make Popplio a starter? I was thinking of having the Magikarp Salesman sell a Popplio instead, or maybe I could add Popplio or Brionne by the Seafoam Islands or something. What do you guys think?