Fixes several moves

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

@@ -0,0 +1,7 @@
+namespace PkmnLib.Plugin.Gen7.Scripts.Moves;
+
+[Script(ScriptCategory.Move, "ally_switch")]
+public class AllySwitch : Script
+{
+    // TODO: Implement the AllySwitch script.
+}

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

@@ -3,6 +3,7 @@ using PkmnLib.Static;
 
 namespace PkmnLib.Plugin.Gen7.Scripts.Moves;
 
+[Script(ScriptCategory.Move, "belch")]
 public class Belch : Script
 {
     /// <inheritdoc />

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

@@ -21,7 +21,7 @@ public class ChangeAllTargetStats : Script
         {
             throw new ArgumentException("Parameter 'amount' is required.");
         }
-        _amount = (sbyte)amount;
+        _amount = (sbyte)(int)amount;
     }
 
     /// <inheritdoc />

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

@@ -28,7 +28,7 @@ public abstract class ChangeTargetStats : Script
             throw new ArgumentException("Parameter 'amount' is required.");
         }
 
-        _amount = (sbyte)amount;
+        _amount = (sbyte)(int)amount;
     }
 
     /// <inheritdoc />

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

@@ -28,7 +28,7 @@ public abstract class ChangeUserStats : Script
             throw new ArgumentException("Parameter 'amount' is required.");
         }
 
-        _amount = (sbyte)amount;
+        _amount = (sbyte)(int)amount;
     }
 
     /// <inheritdoc />

Plugins/PkmnLib.Plugin.Gen7/Scripts/Pokemon/BindEffect.cs

@@ -7,10 +7,6 @@ public class BindEffect : Script
     private int _turns;
     private readonly float _percentOfMaxHealth;
     
-    private BindEffect(float percentOfMaxHealth)
-    {
-        _percentOfMaxHealth = percentOfMaxHealth;
-    }
     
     public BindEffect(IPokemon owner, int turns, float percentOfMaxHealth)
     {

Plugins/PkmnLib.Plugin.Gen7/Scripts/Side/DoomDesireEffect.cs

@@ -19,7 +19,7 @@ public class DoomDesireEffect : Script
         }
     }
     
-    private readonly IBattleSide _side;
+    private readonly IBattleSide? _side;
     private List<Target> _targets = new();
 
     public DoomDesireEffect(IBattleSide side)
@@ -40,6 +40,9 @@ public class DoomDesireEffect : Script
     /// <inheritdoc />
     public override void OnEndTurn(IBattle battle)
     {
+        if (_side == null)
+            return;
+        
         var toRemove = new List<Target>();
         foreach (var v in _targets)
         {