Symbiosis

The Pokémon can pass an item to an ally.

Game descriptions

X, Y, O.Ruby, A.Sapphire:The Pokémon can pass an item to an ally.
Sun, Moon, Ultra Sun, Ultra Moon:The Pokémon passes its item to an ally that has used up an item.
Sword, Shield, B.Diamond, S.Pearl:The Pokémon passes its item to an ally that has used up an item.
Scarlet, Violet:The Pokémon passes its held item to an ally that has used up an item.