I don't know, how to do it? Is it some kind of cheat?
I'm not certain what the other person said but if it's what I'm thinking it is, yes it's a cheat. you can open the menu, go to preferences and click "turn on cheats" then every item is available even limited ones in an infinite capacity in that menu.
if you use it, make sure you go somewhere before saving if you just used items/got them. there was a bug I'm not sure if is still around where if you saved after giving yourself stuff without changing screens the cheated items would vanish.