I've been looking into alternate items to use on KB that allow bluffing z. Both to abuse the ways that players will try to pivot around the z and for the surprise factor of being able to use the z on something else (for example koko, which is both a solid z move user and pairs well with KB).
Life orb is obviously the standard z alternative for KB, but you can't really bluff with it.
The first thing that came to mind for me is expert belt, as kyu's coverage is good, especially with HP fire and it helps all moves both physical and special. And in my testing it worked fine, as the damage calcs is barely worse then LO and there's no recoil.
However, I've also considered quick claw. Because f*** it. KB can OHKO a lot of the faster offensive pokemon that come in to revenge it with supereffective hits or at least deal fat damage to them if it randomly goes first. It's only 20% chance but it can absolutely swing or instawin a game. That said, this is pretty hard to test considering it's just random.
I was wondering if anyone else has given thought to alternative items to Z/LO on KB and could suggest me some. Or if they've tested/what they think about expert belt/quick claw. If anyone has any teams that implement KB with nonstandard item choices or tournament replays that would be even better.