Après deux recherches sur Google:
Upon completing the game, the Lunar Ruins will be unlocked. Much like the Souls of Chaos in "Dawn of Souls", this post-game dungeon is enormous and somewhat randomized, overflowing with dangerous monsters you won´t encounter anywhere else and containing equipment that will turn your party members into nigh-unstoppable powerhouses. Unlike the Souls of Chaos, though, the Lunar Ruins are actually a lot of fun to explore, largely due to the immense variety of activities (good thing, since you have to go through it at least two and a half times to get to the end of it). Sure, some floors are the typical hack-slash-find-exit affair, but others require you to punch a combination on floor tiles scattered throughout, or to catch a toad that´s teleporting around the screen. Also, each and every character has a trial to endure, ranging from a running a gauntlet to investigating a murder to proving your worth as a paladin by doing good deeds; the trials culminate in confrontations with a Lunar Summon (similar in concept to the Dark Aeons of "Final Fantasy X"), after which you´ll receive an ultimate weapon or an item that upgrades your character in some way (ie: Rosa´s White Ring changes the Pray command to Miracle, providing much more potent free healing, while Kain´s Dragoon Gloves allow him to Double Jump).
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