>>54357663NTA but unironically yes. Size variation is the first step in making each pokemon truely feel unique, but imagine if certain parts of a pokemon's texture were pseudo-randomly generated to make each one truely uniqe. Obviously not just slapping random spots on a pokemon, but details that would make sense: the dark patches on Bulbasaur being in different places, Onix having small variations in the shape of its rocks, Milotic having different scale patterns, all just tiny details that would serve to make each pokemon a little bit more unique.
>>54357670All of them, but depending on the generation you're hunting in, some patterns are effectively shiny locked and will either always be shiny or never be shiny due to how the patterns are generated being the same way that shinies are decided.