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What if there was an OM kinda like Linkmons but with items instead of abilities? I would call it Bagmons. Knock Off would permanently eliminate 1 random item from this pool even if the mon that had the item switches back in, it's going to apply to that one mon only to keep things balanced...
I was trying to make the most op thing i could think of in this metagame, how about a core of Melmetal+Perrserker+Bronzong/Melmetal
I made a quick pokepaste of a set with this. https://pokepast.es/c8a5a2b60002760d
Edit:Oops i forgot evs for bronzong