Revise g5 pid bit check for forced PID statics

Closes #3027

Roamers: Get PID generated externally
NPokemon: Get PID from a fixed value
Forced (Anti)Shiny: Get PID altered

Thanks @LegoFigure11 && Princess Emily (discord 4650) !

PKHeX.Core/Legality/Encounters/EncounterStatic/EncounterStatic.cs

@@ -21,7 +21,7 @@ namespace PKHeX.Core
 
         public virtual int Location { get; set; }
         public int Ability { get; set; }
-        public virtual Shiny Shiny { get; set; } = Shiny.Random;
+        public Shiny Shiny { get; set; } = Shiny.Random;
         public int Gender { get; set; } = -1;
         public int EggLocation { get; set; }
         public Nature Nature { get; set; } = Nature.Random;

PKHeX.Core/Legality/Encounters/EncounterStatic/EncounterStatic5N.cs

@@ -3,10 +3,13 @@
     internal sealed class EncounterStatic5N : EncounterStatic5
     {
         public readonly uint PID;
-        public override Shiny Shiny { get; set; } = Shiny.FixedValue;
         public const bool NSparkle = true;
 
-        internal EncounterStatic5N(uint pid) => PID = pid;
+        internal EncounterStatic5N(uint pid)
+        {
+            Shiny = Shiny.FixedValue;
+            PID = pid;
+        }
 
         protected override void SetPINGA(PKM pk, EncounterCriteria criteria)
         {

PKHeX.Core/Legality/Verifiers/PIDVerifier.cs

@@ -51,7 +51,7 @@ namespace PKHeX.Core
                         break;
 
                     // Forced PID or generated without an encounter
-                    if (s is EncounterStatic5N || (s is EncounterStatic5 s5 && s5.Roaming) || s.Shiny == Shiny.Never)
+                    if (s is EncounterStatic5 s5 && (s5.Roaming || s5.Shiny != Shiny.Random))
                         break;
                     VerifyG5PID_IDCorrelation(data);
                     break;