Implements experience gain

PkmnLib.Dynamic/Models/Pokemon.cs

@@ -1184,6 +1184,11 @@ public class PokemonImpl : ScriptSource, IPokemon
         BattleData.BattleSide.MarkFaint(BattleData.Position);
         BattleData.BattleSide.ForceClearPokemonFromField(BattleData.Position);
 
+        foreach (var opponent in BattleData.SeenOpponents.WhereNotNull())
+        {
+            opponent.AddExperience(Library.ExperienceGainCalculator.CalculateExperienceGain(this, opponent));
+        }
+
         // Validate the battle state to see if the battle is over.
         BattleData.Battle.ValidateBattleState();
     }