"Item Limit" Screen Data

I know theres already a Reset combo, but what if you want to simply make an item that just keeps appearing after the enemies have been defeated? I have several rooms in a quest Im fooling with that give you a "still fairy" (which in my quest resembles a magic pot but is red). Giving this only once makes the bonus hard to pinch.

"Item Limit" would be a variable that says how many times you can get the screen item before it permanently dissapears. (1(default)=once,3=three times, 0=infinite)

(Oh yeah, and this would also be reset with the reset combo)