Making Pokemon for the battle tree, so I'm building a Mega Salamence for the battle Tree. So whats a good nature?
Jolly or Adamant are the most common Natures and are used on physical sweeper Salamences (usually a Dragon Dance set.
Niave is a niche used for Mixed Mence, almost unheard of.
I would personally recommend Adamant because after one DD there isn't much that outspeeds Salamence anyways.