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>Mirror herb now steals a stat boost and reverses the opponent’s buff
Eg:
>Cloyster used Shell Smash
>Mirror herb activates
>Your pokémon gets +atk, +sp. atk and +speed (only copies positive changes)
>Cloyster gets -atk, -def. -sp. atk, -sp. def and -speed (positive changes become negative. Negative changes are unaffected)
There, I fixed it. Went from useless to having a small competitive niche in UU and lower tiers