After considering everything you've written, Felix, I'm now leaning towards po'qeymonpu'.
If Meowth can learn a human language, Pokémon are clearly capable of speech. I had never seen the manga with the Kangaskhan-speaking boy before -- interesting!
I suppose anthropomorphic characters who speak in a human language (or "Common") should be -pu'. The Bear family in the Berenstain Bears, for instance, would most likely be tera' mIl'oDpu', not tera' mIl'odmey.
>I
would argue that Pokémon are beings capable of communication via
language, but I don't know that they are necessarily >regarded in that
way by humans (or Klingons).
>
>After
all, we've seen in episodes like Island of the Giant Pokémon that
Pokémon are capable of carrying out entire >conversations, and we've also
seen Team Rocket asking Meowth to translate what Pokémon are saying
into human speech.
>
>
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>Furthermore, Pokémon can understand complex utterances in human speech, and respond to it with body language.
>
>
>In
the anime episode The Kangaskhan Kid, we see a boy who has been raised
by Kangaskhan, and appears to speak their >language. However, I'm not
certain if it's clear if this is language use or just mimicry.
>Apparently, in the manga, it is clear that he speaks Pokémon language.
>
>
>//loghaD