Question

Like when their health is low and they're holding drinks or potions,will they use it?

Answer 1

Simple answer but true.
No. Pokemon can't use items like Potion by themselves.
Unless it is a berry which recovers HP.

Comments

they can use all the kind of berries,not only the one who heals

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Yes, he was just saying this because this was a healing question >.>

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I think they can also use berryjuice