How do you make enemies drop their held items?

[MilodicMellodi]

I've looked and looked, and I can't find anything about it on google. I've had my items forcibly dropped from me — not just "held" items like the Ore Club or Banana, but "equippable" items like the Franklin Badge (I know this because I've had to go against said enemies that actually pick them up and use them...it's really annoying when the enemy you're using Franklin Badge against gets your own Franklin Badge). I know it must be a mechanic, and I've had it happen to me in previous SSB installments (at least in the 3DS version) but it's a mechanic that for some gods-forsaken reason has never been talked about at all. Anywhere. So if anyone knows, I'd love to know, at least so I know how to avoid it continuing to happen to me.

[Zapp Branniglenn]

You can't make your opponent drop a held item, it's always random chance. The formula I've seen floating around for older games suggests your chance of forcing it to happen is higher the more damage your attack is dealing. In my experience, the same principles apply to whether Kirby loses his copy ability after being hit.

[MilodicMellodi]

So it's always random chance, but it has a higher likelihood of happening if, say...you use DK or Ganondorf?
Which essentially translates to "the more you punish, the more you punish more".