Generation Vi
Flower Veil
Prevents lowering of ally Grass-type Pokémon’s stats.
Detailed Effect
Protects friendly Grass Pokémon from having their stats lowered by other Pokémon.
Pokémon With Flower Veil
5 canonical Pokémon forms can have this Ability.

Flabebe
Floette
Florges
Comfey
Floette Eternal