Only need the Treasure Hunter trophy to get the FFXIII plat.. Gonna be a bitch to gain enough gil to purchase some of the weapons :/
I jumped around a lot trying to get enough Gil to pay for everything, but I think I settled on the one Adamantoise in that one area (the one where it falls through the glass). Just clear the area to the door, but don't go through it, then you can go back and forth to respawn it infinitely.
Damn thanks! That bad boy drops a platinum ingot that sells for 150k!!
Yep, it's awesome when he drops it and he's also good for farming Trapezohedrons, which are required to get a tier 2 weapon to tier 3 (so, you'll need like 6 or so of them).