Bunch more moves, changes in how additional information for items works.

Plugins/PkmnLib.Plugin.Gen7/Scripts/Pokemon/NightmareEffect.cs

@@ -0,0 +1,26 @@
+using PkmnLib.Plugin.Gen7.Scripts.Status;
+
+namespace PkmnLib.Plugin.Gen7.Scripts.Pokemon;
+
+[Script(ScriptCategory.Pokemon, "nightmare")]
+public class NightmareEffect : Script
+{
+    private readonly IPokemon _owner;
+
+    public NightmareEffect(IPokemon owner)
+    {
+        _owner = owner;
+    }
+
+    /// <inheritdoc />
+    public override void OnEndTurn(IBattle battle)
+    {
+        if (!_owner.HasStatus(ScriptUtils.ResolveName<Sleep>()))
+        {
+            RemoveSelf();
+            return;
+        }
+        var maxHp = _owner.MaxHealth;
+        _owner.Damage(maxHp / 4, DamageSource.Misc);
+    }
+}