More abilities

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

@@ -0,0 +1,23 @@
+using PkmnLib.Static.Species;
+
+namespace PkmnLib.Plugin.Gen7.Scripts.Abilities;
+
+/// <summary>
+/// Rivalry is an ability that increases damage to Pokémon of the same gender and decreases it to the opposite gender.
+///
+/// <see href="https://bulbapedia.bulbagarden.net/wiki/Rivalry_(Ability)">Bulbapedia - Rivalry</see>
+/// </summary>
+[Script(ScriptCategory.Ability, "rivalry")]
+public class Rivalry : Script
+{
+    /// <inheritdoc />
+    public override void ChangeBasePower(IExecutingMove move, IPokemon target, byte hit, ref ushort basePower)
+    {
+        if (move.User.Gender == Gender.Genderless || target.Gender == Gender.Genderless)
+            return;
+        if (move.User.Gender == target.Gender)
+            basePower = basePower.MultiplyOrMax(1.25f);
+        else
+            basePower = (ushort)(basePower * 0.75f);
+    }
+}