Implements a bunch more moves

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

@@ -0,0 +1,26 @@
+namespace PkmnLib.Plugin.Gen7.Scripts.Moves;
+
+[Script(ScriptCategory.Move, "topsy_turvy")]
+public class TopsyTurvy : Script
+{
+    /// <inheritdoc />
+    public override void OnSecondaryEffect(IExecutingMove move, IPokemon target, byte hit)
+    {
+        EventBatchId batchId = new();
+        var hasChanged = false;
+        foreach (Statistic stat in Enum.GetValues(typeof(Statistic)))
+        {
+            var statBoost = target.StatBoost.GetStatistic(stat);
+            if (statBoost == 0)
+                continue;
+
+            hasChanged = true;
+            var newStatBoost = -statBoost;
+            target.ChangeStatBoost(stat, (sbyte)newStatBoost, target == move.User, batchId);
+        }
+        if (!hasChanged)
+        {
+            move.GetHitData(target, hit).Fail();
+        }
+    }
+}