Question

Is there any held item that boosts the power of punching moves such as Thunder Punch?

Answer 1

As of Pokemon Scarlet and Violet, the Punching Glove was introduced, which increases the power of punch-based attacks by 10% while preventing them from making contact. This can be purchased at Delibird Presents at Mesagoza after 4 Gym Badges.

Answer 2

No, unfortunately. There is an ability though. It's called Iron Fist.

Comments

my pangoro has iron fist already i was hoping that it could get stronger

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Well, you could use something like a Choice Band or a Life Orb, or even a Muscle Band (though I don't recommend it.)