PlayStation Move Heroes

This trophy is actually much easier than it sounds, since the 2nd Player actually has the option to use the crystals they collect as time extends instead of ammo (but only on timed challenges). I recommend going for this on the Paris Diamond Challenge, Marksman Manor Mayhem. Collect several crystals with Player 2, then switch to the Time Extend option by pressing and spam them at Player 1 with the button 10 times throughout the challenge.