There's a few little details which are incorrect. It states (in the walkthrough) that in Nelde Ruins 3-1, section 5, (the one with the big flower) it says the mushroom there is a Laughshroom, where it actually is a power shroom.

Second: Although I haven't confirmed this one yet on the GBA version as I'm playing the WSC version at the moment. The switch chest scene in chapter 5, the walkthrough states that you don't lose any trust/mood if you decide to "feel" around.

However, Fia had a musical note on her status screen before the event. Right after the event though, she had lost the musical note and had a blank there.

As I said, only little errors which I've found.