Scironex
The Destroyer
The idea here is simple: the fewer times you get hit against a boss, the likelier it is that a trophy drops. Let's say, on a perfect battle, the trophy has a drop chance of 80% (I dunno. Just a random high percentage.). Every time you get hit, that chance drops by 10% until it hits the base chance, err... 10% apparently. So after getting hit once, it's 70%. Get hit three times, and it's 50%. Seven or more, and you might as well get hit some more. It would provide a better incentive to play skillfully, rather than cheat the system with spike exploits.