[Request] Duplication exploit

Lately we all have been witnessing again a massive wave of duped items (such as PPPs being 600each). I was wondering if anyone could share how to duplicate, I know everyone wanna keep it for themselves but its worth to try. Thanks to anyone who might know how to do it and dont mind sharing it w/ me. My dc is "ms.skelly." if you wanna keep it private, I for sure will too (๑˃͈꒵˂͈๑)

I've been told it has to do with being able to infinitely collect something, not sure how true that is though. however it makes sense with all the pinatas being duped