They don't really affect the story in any way, they're only available again like right before the Final Dungeon. That, Lunar Ruins, and a few glitches are the only real differences from the original.
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The translation is a billion times better. So far, IV for the GBA is the only remake I've ever played where I really said "WOW," this improves the original a ton, not (oooh, accidental palindrome) just "ok, it's a little nicer looking and faster but that's it."
I never use meteo.
bahamut does the same thing...for 39 less mp =)
Please do not post in old threads, im_mrbrightside20.