Yes.
Ah, It'll be better to show you:
[IMG]
So say Snivy wants to use tackle. The Player would make a roleplay post that ends up Snivy using tackle. Depending on how you roleplay the given situation, the foe could take the hit, dodge, or do at least minimum damage. Its the "variant" damage.
There will be like a HP stat, where you can keep monitor of, as well as your attack, defense, speed, special attack, and special defense stat where it does "base damage". The actual damage a pokemon is supposed to do.
Makes sense? :3
Well, there are some tweaks I'll put in it, but basically, yeah.