Implements an initial version of Baton Pass.

Will probably need some additional work in the future.

PkmnLib.Dynamic/Models/Choices/MoveChoice.cs

@@ -1,4 +1,5 @@
 using PkmnLib.Dynamic.ScriptHandling;
+using PkmnLib.Static.Utils;
 
 namespace PkmnLib.Dynamic.Models.Choices;
 
@@ -31,6 +32,8 @@ public interface IMoveChoice : ITurnChoice
     /// The underlying script of the move.
     /// </summary>
     ScriptContainer Script { get; set; }
+    
+    Dictionary<StringKey, object?>? AdditionalData { get; }
 }
 
 /// <inheritdoc cref="IMoveChoice"/>
@@ -69,6 +72,9 @@ public class MoveChoice : TurnChoice, IMoveChoice
     /// <inheritdoc />
     public ScriptContainer Script { get; set; } = new();
 
+    /// <inheritdoc />
+    public Dictionary<StringKey, object?>? AdditionalData { get; }
+
     /// <inheritdoc />
     public override int ScriptCount => 1 + User.ScriptCount;
 

PkmnLib.Dynamic/ScriptHandling/ScriptContainer.cs

@@ -65,4 +65,9 @@ public class ScriptContainer : IEnumerable<ScriptContainer>, IDeepCloneable
         }
         Script = null;
     }
+    
+    public void ClearWithoutRemoving()
+    {
+        Script = null;
+    }
 }

PkmnLib.Tests/Data/Moves.json

@@ -728,7 +728,10 @@
       "priority": 0,
       "target": "Self",
       "category": "status",
-      "flags": []
+      "flags": [],
+      "effect": {
+        "name": "baton_pass"
+      }
     },
     {
       "name": "beak_blast",

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

@@ -0,0 +1,48 @@
+using System;
+using System.Linq;
+using PkmnLib.Dynamic.Models;
+using PkmnLib.Dynamic.ScriptHandling;
+using PkmnLib.Dynamic.ScriptHandling.Registry;
+using PkmnLib.Static;
+using PkmnLib.Static.Utils;
+
+namespace PkmnLib.Plugin.Gen7.Scripts.Moves;
+
+[Script(ScriptCategory.Move, "baton_pass")]
+public class BatonPass : Script
+{
+    /// <inheritdoc />
+    public override void OnSecondaryEffect(IExecutingMove move, IPokemon target, byte hit)
+    {
+        var user = move.User;
+        var additionalData = move.MoveChoice.AdditionalData;
+        if (additionalData == null)
+            return;
+        if (additionalData["to_switch"] is not IPokemon toSwitch)
+            return;
+        var battleData = user.BattleData;
+        if (battleData == null)
+            return;
+        
+        var statBoosts = user.StatBoost;
+        var volatileScripts = user.Volatile.Select(x => x.Script).WhereNotNull().ToList();
+        foreach (var container in user.Volatile)
+        {
+            container.ClearWithoutRemoving();
+        }
+        
+        var side = battleData.Battle.Sides[battleData.SideIndex];
+        side.SwapPokemon(battleData.Position, toSwitch);
+
+        foreach (Statistic stat in Enum.GetValues(typeof(Statistic)))
+        {
+            toSwitch.StatBoost.SetStatistic(stat, statBoosts.GetStatistic(stat));
+        }
+        toSwitch.RecalculateBoostedStats();
+        
+        foreach (var script in volatileScripts)
+        {
+            toSwitch.Volatile.Add(script);
+        }
+    }
+}