Flamigo

Another in the "took them long enough" department is the first flamingo Pokemon, and that there sure is a flamingo that's a Pokemon! It's only lightly stylized, with big circular yellow eyes and a beak with a more rounded, bulbous "chin" than the real thing. The most unusual detail of its design is that its neck is tied in a knot where it meets the body, and apparently it ties this knot itself to keep its "energy" from "escaping," so it's like a balloon I guess? It also evokes a plastic lawn flamingo, of course, but it's hard to make a cartoon flamingo that wouldn't do so by default really. It's a flying and fighting type, for whatever reason, it doesn't evolve and it has the signature hidden ability "costar," which copies an ally's stat changes during double battles.

I'm glad people who love flamingos can have just a straight-up flamingo in this game, though I imagine some swathe of the mingofandom would probably rather have something weirder and more outrageous. My own concept for a pokemingo was an electric type stylized like a neon sign, and I could also see a water/fire mingo based on hot springs or even a surprise poison type based on the fact that the real birds thrive in acidic soda lakes. The fact that they also get their coloration from their diet of shrimp could have also been incorporated here, for instance a color-changing gimmick depending on what you've fed your Flamigo in-game. Lots of unexplored potential for such a deeply bizarre dinosaur, but still, I guess it could have been worse.