More abilities, refactor custom triggers to be typed.

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

@@ -0,0 +1,20 @@
+namespace PkmnLib.Plugin.Gen7.Scripts.Abilities;
+
+/// <summary>
+/// Marvel Scale is an ability that increases the Pokémon's Defense by 50% when it has a status condition.
+///
+/// <see href="https://bulbapedia.bulbagarden.net/wiki/Marvel_Scale_(Ability)">Bulbapedia - Marvel Scale</see>
+/// </summary>
+[Script(ScriptCategory.Ability, "marvel_scale")]
+public class MarvelScale : Script
+{
+    /// <inheritdoc />
+    public override void ChangeIncomingMoveDefensiveStatValue(IExecutingMove move, IPokemon target, byte hit,
+        uint offensiveStat, StatisticSet<uint> statisticSet, Statistic stat, ref uint value)
+    {
+        if (!target.StatusScript.IsEmpty && stat == Statistic.Defense)
+        {
+            value = value.MultiplyOrMax(1.5f);
+        }
+    }
+}