You know, knock off is overrated. I prefer to chuck a disk at mach 43 towards a-raichu instead. You dont even need to run adamant.
- 252 Atk TR43 Pikachu Fling (130 BP) vs. 0 HP / 0 Def Raichu-Alola: 286-338 (109.5 - 129.5%) -- guaranteed OHKO
If you chose to run adamant, even with a + Defense...