How is Bigieu/Isabella a villain in Seiken Densetsu 3 and a friend to the heroes in Sword of Mana? I've always considered Sword of Mana/Final Fantasy Advance to happen after SD3, though I could be wrong about this. Or are they even the same person?
Probably just a Shout-Out. The two Isabellas act nothing alike; just like how all the Mana games have had a Watts, and how Goremand is a lot lamer than Deathjester.