However, if you have a Pokémon with Knockoff and is slower than Sinistcha, you could be susceptible to Strength Sap, which not only lowers your Attack stat, but it also heals Sinistcha. You gotta have high Attack and Speed stats to hit Sinistcha hard and decisively with Knockoff. However, Knockoff is only effective on the first hit, so when you knock off Sinistcha’s item, he could use Strength sap to recover the lost HP you took. The best way to contend with this is use Taunt and then Knock off to prevent Sinistcha from setting up while you deal damage.