Good point. However if KO works, then you've saved your item for laterHow would it negate Knock off? Why would that even matter? If someone used knock off on your pokemon holding a Mental Herb, it would be knocked off and... well... thats that.
Even if it DID "negate" Knock Off, they would use Knock Off, and the Mental Herb would be used, and Knock Off would have succeeded in... well... getting rid of the item.
Yes it's useless on shuckle, but shuckle needs leftys anyway. I'd say that it is most useful in either getting a single guaranteed hazard layer, or preventing from losing a turn from an unexpected taunt, and avoiding Whimsicott's encore.wow. I could put this on shuckle and not worry about it being taunted for one move. But then, the opponent could use Taunt again when the item has been used. I'd say its not good, unless you needed that one extra turn.
Or a Shell Smash Mental Herb sweeper. Heh.So instead of suicide SR leads we get to deal with bulky SR leads holding Mental Herb this time? Great.
I think you're mixing it up with white herb (restores lowered stats). A shell smash sweeper would only really need mental herb to dodge priority encoreOr a Shell Smash Mental Herb sweeper. Heh.
Well, basically any Pokémon that doesn't need an item like Leftovers and can effectively set up entry hazards. I think that basically any lead that wants to set up Stealth Rock would be good with this, along with stuff like Skarmory or Ferrothorn or other Pokémon that people usually use Taunt against because they're predicting a move like Stealth Rock. However, this wouldn't be that good for Pokémon that want to set up Spikes or Toxic Spikes because you would only get one layer in and then proceed to get affected by Taunt again in the next turn, if your opponent chooses to use Taunt again. This actually also would be nice with Pokémon who can use Swords Dance or Nasty Plot when people will try to predict them and use Taunt. It would be a surefire +2 in Attack or Special Attack, which would be very useful. Overall I think that this move really should be put on the Pokémon who usually get Taunt used on them, which would be mainly leads that set up entry hazards. However, it has some other nice applications as well.This looks like a good item for pokemon that set up/dont attack. What pokemon could use this well?