If you give augments to a leaving character they are gone forever, but when they leave your party you get unique augment(s) back. Some of which are the best ones in the game, which is why a guide is important.
Make sure you pay attention to counters. I know in the original this wasn't well identified by the game (don't know about the GBA), but in this there are many enemies and bosses who counter certain actions in certain nasty ways.




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