What about the voices and dialogue?I know it's short but:
Kanto, Orange Islands, and The Johto Journeys kept a considerable amount of Japanese BGM. (Heck, about 8 or 9 episodes actually had all of the music intact with the dub music filling in silence). They were at least watchable to me.
More dub music than the Japanese BGM from Johto League Champions up to the end of 4kids' run consistently (the average maximum was 6-7 at most.) I didn't like how they replaced the soundtrack from Revelation Lugia in the Master Quest episodes (Movie 2 had some of the best music I heard in a Pokemon franchise).