Add gen2 KOR localization exceptions

Closes #1547
Thanks @host1126 !

PKHeX.Core/PKM/PKX.cs

@@ -220,6 +220,8 @@ namespace PKHeX.Core
                 return "タマゴ";
 
             string nick = GetSpeciesName(species, lang);
+            if (generation == 2 && lang == (int)LanguageID.Korean)
+                return StringConverter.LocalizeKOR2(nick);
 
             if (generation < 5 && (generation != 4 || species != 0)) // All caps GenIV and previous, except GenIV eggs.
             {

PKHeX.Core/PKM/StringConverter.cs

@@ -2040,5 +2040,22 @@ namespace PKHeX.Core
             { 'Ê', 'E' },
             { 'Ï', 'I' },
         };
+
+        /// <summary>
+        /// Localizes a Gen4+ Korean species name to the localization used in Generation 2 Gold/Silver
+        /// </summary>
+        /// <param name="nick">Generation 4 Species Name</param>
+        /// <returns>Localized Name for Generation 2</returns>
+        public static string LocalizeKOR2(string nick)
+        {
+            if (KorG2Localized.TryGetValue(nick, out string localized))
+                return localized;
+            return nick;
+        }
+        private static readonly Dictionary<string, string> KorG2Localized = new Dictionary<string, string>
+        {
+            { "덩쿠리", "덩구리" }, // Tangela
+            { "슈륙챙이", "수륙챙이" }, // Poliwhirl
+        };
     }
 }