Use of items in Black tower and white forest?

Question

Lets say am in a battle against the boss of the Black tower, can I use a item(like potions and Pokeballs)

Answer 1

You can't throw a Pokeball at any trainer's Pokemon, first of all.
Secondly, you cannot use items on your Pokemon while taking the Black Tower/White Treehollow challenge.
However, you can give your Pokemon items and save during the challenge.

Source

Comments

No i mean can you atlewst try to trow the pokeball?

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No, since you can't access your bag during battle.

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Damn it! So my hacks are worthless!