Back @ Corey's gym in the Beryl Cemetary, you can catch wild Phanpys. They evolve at level 25, so just grind it near your levels. It gets Knock Off and Magnitude/Earthquake rather early-wait we can't access the Move Relearners house at this point of the game in E14 huh? why amethyst why You can't get knock off as it learns it at lv.19. You'll have to rely on Magnitude .
Btws, there are a few early game ability capsules, sorry I don't know where they are.Use one on Loudred, it can get Scrappy, pair that with Echoed Voice, and that will do wonders. Just keep dat loud healthy.