Eragon isn't trying to outdo Final Fantasy, it's borrowing enough of its good ideas to put together a fairly deep and satisfying adaptation of the movie, and if you can forgive a lack of meaningful innovation, it does a pretty good job of it.
Eragon for the GBA is a surprise for me because it kept reminding me of RPGs from the 16-Bit era. This isn't another cookie-cutter licensed game; instead the game offers a deep, albeit flawed, gameplay experience.
At the very least, Eragon is tolerable, bug-free, and does not try to stuff the console versions into the tiny, low-power package of the GBA, thereby producing a distinct experience by licensed game standards.
Eragon does a good job of trying to emulate a classic style of game, and at times, it almost succeeds. But even at its best, it's no more than a clone, which is coincidentally, the same issue with the Eragon novel.