I remember reading a fanfiction about this once upon a time. It was interesting to say the least, I would imagine that he would feel outright dirty at first but would eventually have to get used to it.
Also, Meowth strives to be as human-like as possible, so there's a chance that he may try to become bipedal as a persian too. That idea kinda scares me ._. And I can't imagine Meowth's voice coming out of a persian, it's just weird.
Yeah, he hates Persians with a dying passion. He won't ever evolve or he'd be a hypocrite. That would mess with the writer's characterization of Meowth. And besides, a Persian can't disguise itself. Though talking is another thing on its own. If Meowth taught himself as a Meowth, he can do it as a Persion. That's just my take.I wouldn't want to see Meowth evolve because, for starters, he greatly dislikes Persian and I don't see that changing anytime soon. I also think that Meowth might lose his ability to talk (which is one of his greatest perks as a Pokemon) when he evolves, but that's just my theory.
I think Meoth would sound super wierd as a persian. Also, the look doesn't really suit his personality. It would be cool to maybe see for an episode or something, like in a dream scenario.
I can see Pikachu evolve before Meowth :/