update forme to showdown strings (#2558)

* update forme to showdown strings

Galarian is represented as Galar on PS!
Polteageist has no form atall
galarian now called Galar by default to match with Alola as a forme. changed darmanitan forme-strings in form converter. Added sinistea to the forme ignore list when converting to showdown

PKHeX.Core/Editing/ShowdownSet.cs

@@ -652,6 +652,8 @@ namespace PKHeX.Core
                 case (int)Core.Species.Furfrou:
                 case (int)Core.Species.Greninja:
                 case (int)Core.Species.Rockruff:
+                case (int)Core.Species.Polteageist:
+                case (int)Core.Species.Sinistea:
                     return string.Empty;
                 default:
                     if (Legal.Totem_USUM.Contains(spec) && form == "Large")
@@ -699,6 +701,12 @@ namespace PKHeX.Core
                 case (int)Core.Species.Toxtricity when form == "Low-Key":
                     return "Low Key";
 
+                // Darmanitan
+                case (int)Core.Species.Darmanitan:
+                    if (form == "Zen-Galar")
+                        return "Zen Galar";
+                    return form;
+
                 default:
                     if (Legal.Totem_USUM.Contains(spec) && form.EndsWith("Totem"))
                         return "Large";

PKHeX.Core/PKM/Util/FormConverter.cs

@@ -257,10 +257,10 @@ namespace PKHeX.Core
                     }
                     return new[]
                     {
-                        types[0] + " " + forms[555], // Standard
+                        forms[555], // Standard
-                        types[0] + " " + forms[943], // Zen
+                        forms[943], // Zen
-                        forms[Galarian] + " " + forms[555], // Standard
+                        forms[Galarian], // Standard
-                        forms[Galarian] + " " + forms[943], // Zen
+                        forms[943] + " " + forms[Galarian], // Zen
                     };
                 }