>>51232522Rotom uses technology to talk, Rotom itself is not speaking directly to you but using the device it inhibits to do it. Meowth isn't using technology, he speaks just like a normal person because he taught himself to do that which I think is a big distinction. If we look at the product approval guide they bring it up and it's relation with the anime. Pokémon do not speak or behave as humans is the header. This section notes that there are limit cases where Pokémon talk but makes it clear that most of them were done for special storylines. Think Sir Aaron's Lucario pictured there. Movie 8 was the debut of Lucario so to make it more special they allowed it to talk but every other Lucario doesn't talk.
If I were to guess as to why it's as the section states, Pokémon don't behave or speak like humans. Talking is a big part in humanizing things, its the difference between the two robots from Star Wars, one beeps and the other one talks and the one that talks is more humanized despite both being machines. If I'm correct this is probably why Meowth doesn't talk in the games despite being an integral point of Meowth's character in the anime. They simply don't like the idea of recurring talking Pokémon even when the framework is there.
