>>15957089They did adjust the dialogue a little so that it makes sense in English, but it's pretty much word-for-word the same as the Japanese version.
My only complaint is that Oak sounds waaaaay too young.
On the other hand, Brock's voice actor suits him perfectly, and Green/Blue is an arrogant little shit. Those two work really well.
They did shorten Charmander's scream when he got bit, but c'mon. When the Japanese version was released, every single one of us was complaining about how horrifying it was.