diff --git a/PkmnLibSharp/Battling/PokemonParty.cs b/PkmnLibSharp/Battling/PokemonParty.cs
index 8e17193..85c8e42 100644
--- a/PkmnLibSharp/Battling/PokemonParty.cs
+++ b/PkmnLibSharp/Battling/PokemonParty.cs
@@ -34,7 +34,8 @@ namespace PkmnLibSharp.Battling
 
         public Pokemon SwapInto(ulong indexA, Pokemon pokemon)
         {
-            var ptr = Creaturelib.Generated.CreatureParty.SwapInto(Ptr, indexA, pokemon.Ptr);
+            var ptr = IntPtr.Zero;
+            Creaturelib.Generated.CreatureParty.SwapInto(ref ptr, Ptr, indexA, pokemon.Ptr).Assert();
             if (TryResolvePointer(ptr, out Pokemon? newPokemon))
                 return newPokemon!;
             return new Pokemon(ptr);
diff --git a/PkmnLibSharp/Generated/Creaturelib/CreatureParty.cs b/PkmnLibSharp/Generated/Creaturelib/CreatureParty.cs
index 44a611c..7ca870a 100644
--- a/PkmnLibSharp/Generated/Creaturelib/CreatureParty.cs
+++ b/PkmnLibSharp/Generated/Creaturelib/CreatureParty.cs
@@ -41,12 +41,13 @@ namespace Creaturelib.Generated
         [DllImport("CreatureLib", CallingConvention = CallingConvention.Cdecl, EntryPoint= "CreatureLib_CreatureParty_PackParty")]
         internal static extern byte PackParty(IntPtr p);
 
+        /// <param name="out">Creature * &</param>
         /// <param name="p">CreatureParty *</param>
         /// <param name="index">long unsigned int</param>
         /// <param name="creature">Creature *</param>
-        /// <returns>Creature *</returns>
+        /// <returns>unsigned char</returns>
         [DllImport("CreatureLib", CallingConvention = CallingConvention.Cdecl, EntryPoint= "CreatureLib_CreatureParty_SwapInto")]
-        internal static extern IntPtr SwapInto(IntPtr p, ulong index, IntPtr creature);
+        internal static extern byte SwapInto(ref IntPtr @out, IntPtr p, ulong index, IntPtr creature);
 
         /// <param name="p">const CreatureParty *</param>
         /// <returns>bool</returns>