Created by Honko. Based on AMF's damage calculator. Thanks to Xfr, Bond697, Kaphotics, and V4Victini for the formula.
HOW TO PLAY: Select a defender, adjust its stats/item/ability/weatherfulness as necessary, pick your tiers, and hit GO! Mouse over the fields for further explanation.
To see how a Pokemon fares offensively instead, check out the "One vs All" calculator. If you want to tweak both the attacker and the target, try the 1v1 damage calculator.