I do really appreciate how Pokémon Super Mystery Dungeon handles the way that you get to choose your pokémon species. Sure, you've got the quiz that you do first and you get an assigned pokémon based on the quiz, but what I love is how they ask you if they got it right and if this is the pokémon for you. Unlike other games, you're not stuck with what you're assigned and you get to choose the pokémon for yourself. The way that they ask it feels kind and open-minded. They don't assume they got it right, and they are receptive about you letting them openly know what pokémon you -really- want to be.
It feels subtly affirming that the pokémon you pick is one that is really close to how you identify. It invokes the feeling that the game wanted to give an honest attempt at a best guess. They also acknowledge they could have it wrong and that it's important to them to get it right for you. They want you to be happy with your pokémon. The PMD games have always had a place in my heart as being a subtle exploration of non-human identity. I think that the devs really wanted to make an honest attempt at acknowledging that having full agency over what pokémon you identify as deeply matters to a lot of its player base.
Note that this is not me saying "Chunsoft knows what otherkin is and wanted to make a game for us". I don't think it's impossible that they know -about- otherkin, if only because of the skew in player demographics. However, I think there's otherkin-adjacent feelings that they realise are important to the game.
For example, I definitely think they know about people wanting to play as their inner pokémon, or let out their inner pokémon, or escape human life and live in a world of pokémon, and other such every day terms that are more palatable and understandable to non-kin folks. That's kind of the whole point of these games. It's been baked into the formula since day one that you're a human, you got turned into a pokémon, and you're stuck in this world wondering about if you can ever return, and slowly but surely accepting your life and being happier with your new form. The thought of turning back to your life seems not only impossible, you're not sure if you really feel like going back.
Like, let's be real here, they know the feelings they wanna invoke, they know what demographic they are targeting, and they HAVE to know at least from researching their player base what is important for the majority of them, even if they've not directly come into contact with the idea of what otherkin is. Maybe it's all just an accident, but they really managed to make THE otherkin game. And...well...a good game developer knows its audience.