Been using it for about 10-20 minutes, went through the whole of Hiun's Gym without any real problems.
A few things, though. There seem to be some random lines of Japanese during battle. One of them was after I was hit with Poison Tail, though it only happened once, even though I was hit by it a few times. I'm guessing it's "A critical hit!"? Also, the Protect or Detect (not sure which one) move still gives a line of Japanese (whenI'm guessing it's saying ___ protected itself!"). Minor issue, but it's worth nothing. The text that you get when you're trying to learn a new move is also in Japanese, as are the descriptions for a few of the new items.