Why did the item not get knocked off?

Jul. 7, 2021

On turn 13 inthisreplay, Rillaboom uses Knock Off on Ferrothorn but the Rocky Helmet isn’t knocked off. Is it because Rillaboom fainted?

Pleaselog inorregisterto add a comment.

If the user faintsdue to the target’s Ability (Rough Skin or Iron Barbs) orheld Rocky Helmet, it cannot remove the target’s held item.However, Knock Off will still remove the target’s held item if the user faints due to its own held Life Orb. If Knock Off causes a Pokémon with the Sticky Hold Ability to faint, it can now remove its held item.

Source

I also asked this in Showdown!’s Help room and got the same reply.

[22:53:47] @Think~?: Yes, it does.[22:53:49] %PartMan: If the Pokemon faints to damage while Knocking Off, it isn’t knocked off, yeah/.

Hope this helps!