More moves

Plugins/PkmnLib.Plugin.Gen7/Scripts/Moves/PerishSong.cs

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+using System.Linq;
+using PkmnLib.Static;
+using PkmnLib.Plugin.Gen7.Scripts.Pokemon;
+using PkmnLib.Static.Utils;
+
+namespace PkmnLib.Plugin.Gen7.Scripts.Moves;
+
+/// <summary>
+/// Implements the secondary effect of Perish Song, which causes all Pokemon on the field to faint in 3 turns.
+/// </summary>
+[Script(ScriptCategory.Move, "perish_song")]
+public class PerishSong : Script
+{
+    /// <inheritdoc />
+    public override void OnSecondaryEffect(IExecutingMove move, IPokemon target, byte hit)
+    {
+        if (move.User.Volatile.Contains<PerishSongEffect>())
+            return;
+
+        var battleData = move.User.BattleData;
+        if (battleData == null)
+            return;
+
+        // Add Perish Song volatile to all Pokémon on the field
+        foreach (var pokemon in battleData.Battle.Sides.SelectMany(x => x.Pokemon).WhereNotNull())
+        {
+            pokemon.Volatile.Add(new PerishSongEffect(pokemon));
+        }
+    }
+}