SO, I legit spent a solid 3+ hours trying the heart scale method. When I first heard about it, I was skeptical. Then recently I defeated Selene and remembered. I learned in 30 minutes sentret cant learn covet naturally, so I have to breed it with an eevee that knows it.
Level up eevee to 30 and it still doesnt know covet, and heart scale didnt work. SOO it says at level 1 it learns covet. No joke it took me over 40 minutes to hatch 1.
SURPRISE it knows all the moves of its parents. So I researched yanma and found out it was dam perfect EXCEPT you need thief which is in holon. Tried frisk banette and leveled it up to 47. ONCE AGAIN shuppet/banette dont learn trick.
My best option is wait till calreath to get trick because the game although good, has so many moveset problems and probably received its last update over 5 years ago and most posts are 100% outdated
I feels as if alot of things got patched