diff --git a/library/Structures/Pokemon5.cs b/library/Structures/Pokemon5.cs
index ff332c9f..33a43490 100644
--- a/library/Structures/Pokemon5.cs
+++ b/library/Structures/Pokemon5.cs
@@ -105,7 +105,7 @@ namespace PkmnFoundations.Structures
                 m_genderless = (forme & 0x04) != 0;
                 FormID = (byte)(forme >> 3);
 
-                byte nature = block[25]; // todo: which nature is real? Do they both need to match?
+                m_nature = block[25]; // todo: which nature is real? Do they both need to match?
                 m_bw_flags = BitConverter.ToUInt16(block, 26);
                 HiddenAbility = (m_bw_flags & 0x01) != 0;
                 N = (m_bw_flags & 0x02) != 0;
@@ -184,6 +184,15 @@ namespace PkmnFoundations.Structures
             get { return Generations.Generation5; }
         }
 
+        private byte m_nature;
+        public override Natures Nature
+        {
+            get
+            {
+                return (Natures)(m_nature % 25u);
+            }
+        }
+
         private ushort m_bw_flags;
         public bool HiddenAbility { get; set; }
         public bool N { get; set; }
diff --git a/library/Structures/PokemonBase.cs b/library/Structures/PokemonBase.cs
index d315965f..42834da4 100644
--- a/library/Structures/PokemonBase.cs
+++ b/library/Structures/PokemonBase.cs
@@ -123,7 +123,7 @@ namespace PkmnFoundations.Structures
         public IList<MoveSlot> Moves { get { return m_moves; } }
         public uint TrainerID { get; set; }
         public uint Personality { get; set; }
-        public Natures Nature { get { return (Natures)(Personality % 25u); } }
+        public virtual Natures Nature { get { return (Natures)(Personality % 25u); } }
         public byte Happiness { get; set; }
         public Languages Language { get; set; }
         public IvStatValues IVs { get; set; }