All I have left for this game is the Treasure Hunter trophy. Grinding the turtles has long lost it's appeal and I'm very close to completion. I only have a couple of the high-end accessories to upgrade and about half the weaponry. As a change of pace from the turtles I think I'd rather just go farm for the catalysts themselves. Do any enemies drop Adamantite, Pervoskite, or Uranite? Mission Marks with catalysts as the second win reward would be best, but I can't seem to locate a decent guide for the game that gets into that level of detail on the Mission Marks. Sorry if I've misspelled the catalyst names, I'm at work and don't have my list handy.
Hope I can get this trophy this weekend.... I'm about tired of this game and I'm more than sick of battling tortoises.