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The problem that OP faces with his objective mantra on Magmar and the whole anatomy makes no sense on the clear fact that anatomical features work when you have a base on it. Drawing human beings be it faces or bodies are only stronger by being as approximately close to how we look in real life but notice I said close and not completely realistic as we use stylization to showcase aspects that you're aware that exists but abstract or highlight it more. Same goes for drawing animals and shit. Just look at anthropomorphic animals in cartoons.
And going back to Pokemon the absurd idea that it needs working anatomy to be a good design is an absurd idea because they're meant to call out ideas of fantasy monsters, concepts, animals and etc. in a manner of looking simple doing so. They don't have to be literal 101 drawn to their source base. Its about making iconic imagery and our brains can easily filter out any nonsense if they move or not because on the sheer fact that they look like anything we see in real life. Yes certain pokemon have far more detailed body structures but every pokemon has a different point to get across be them looking intimidating, cute, creepy, beautiful, goofy and etc.
Lastly the notion of objective art doesn't exist on the principle that art has no criteria that makes one thing good or bad. By the sheer idea of goodness or badness makes it detectable to be subjective. Because science is about discovering truth and art is about sharing personal truths. Art is a communication tool in the likes of a language tool. And like any languages its contextual viewing is prone to change overtime be it for many reasons.