Should we introduce natures?

Should we introduce natures? The natures would be optional for use, and they would give a +1 and -1 on the stats all through the battle.

e.g., I have an Arcanine with Adamant nature. At the start of the battle, and all through the battle, it will have +1 Atk and -1 Sp.Atk.

Another thing to introduce may be the use of held items (e.g, berries, or battle held items like Leftovers, Rocky Helmet, etc.)

I'll leave this up to you guys, but I might end up implementing held items eventually.If anyone would like to help us set up Abilities, PM me.