>>52943393>>52944943>>52944959the whole point of convergents is to functionally have regional forms for environments a Pokemon couldn't survive in
Diglett can't magically grow gills, so a new mon took on their advantageous traits to conquer Diglett's niche underwater
same thing with Tentacool, they can't just walk out of the ocean so a new mon took their niche but on land
meanwhile a Sandshrew CAN gradually adapt to live in snow, and a Wooper CAN adapt to be fully terrestrial, so a new mon doesn't take their niche and we just get regional forms
