Last couple abilities

Plugins/PkmnLib.Plugin.Gen7/Scripts/Abilities/WeakArmor.cs

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+using PkmnLib.Static.Moves;
+
+namespace PkmnLib.Plugin.Gen7.Scripts.Abilities;
+
+/// <summary>
+/// Weak Armor is an ability that lowers Defense and raises Speed when hit by a physical move.
+///
+/// <see href="https://bulbapedia.bulbagarden.net/wiki/Weak_Armor_(Ability)">Bulbapedia - Weak Armor</see>
+/// </summary>
+[Script(ScriptCategory.Ability, "weak_armor")]
+public class WeakArmor : Script
+{
+    /// <inheritdoc />
+    public override void OnIncomingHit(IExecutingMove move, IPokemon target, byte hit)
+    {
+        if (move.UseMove.Category != MoveCategory.Physical)
+            return;
+
+        target.BattleData?.Battle.EventHook.Invoke(new AbilityTriggerEvent(target));
+        target.ChangeStatBoost(Statistic.Defense, -1, true, false);
+        target.ChangeStatBoost(Statistic.Speed, 1, true, false);
+    }
+}