GameFreak removes the need for HM slaves by replacing them with summonable Pokemon, and you want aesthetic options for it? ORAS had multiple kinds of Surf Pokemon with their own models (and traits, but it's not what matters in my point) for what was basically no reason whatsoever, so ...
Having all the HMs and other field abilities like secret power can make up to half your team consist of nothing but HM slaves, reducing your battle options and ability to fill your team and moves with abilities that are more appealing. At least in R/B/Y you can spread the wealth with ...
Gossifleur prefers land with clear water and air. Its pollen has a healing effect and is commonly used as a folk medicine remedy and made into a tea given to children in the Galar region when they are ill. Gossifleur travels over long distances by getting blown along by the wind. ...