Validate movechoice target

PkmnLib.Dynamic/Models/Battle.cs

@@ -236,7 +236,9 @@ public class BattleImpl : ScriptSource, IBattle
             // TODO: Hook to change number of PP needed.
             if (moveChoice.ChosenMove.CurrentPp < 1)
                 return false;
-            // TODO: Validate target
+            if (!TargetResolver.IsValidTarget(moveChoice.TargetSide, moveChoice.TargetPosition,
+                    moveChoice.ChosenMove.MoveData.Target, moveChoice.User))
+                return false;
         }
 
         return true;