I just wanted to share my rendition of a realistic Suicune, I drew this during a power outage a few days ago.

Suicune is a water type, and therefore adapted to water! Mane? Those are gill filaments! His cheeks actually function as operculum, and he has no need for nostrils because the gill filaments pick up oxygen in the water.

No fur, just skin for respiration above water- think frog's skin. Maybe that's why Suicune is always found near water in HG/SS... Webbed feet means more surface area, which means more powerful swimming capacity and a heighted "standing-on-water" Jesus effect.

And... that crest is very obviously deer antlers. I dunno what they'd do to help him swim/be with water but damn if they don't look cool.