diff --git a/PKHeX.Core/PKM/PK1.cs b/PKHeX.Core/PKM/PK1.cs
index 191922886..7fcd2266e 100644
--- a/PKHeX.Core/PKM/PK1.cs
+++ b/PKHeX.Core/PKM/PK1.cs
@@ -367,7 +367,7 @@ namespace PKHeX.Core
                 CurrentLevel = CurrentLevel,
                 EXP = EXP,
                 Met_Level = CurrentLevel,
-                Nature = (int) (EXP%25),
+                Nature = Experience.GetNatureVC(EXP),
                 PID = Util.Rand32(),
                 Ball = 4,
                 MetDate = DateTime.Now,
diff --git a/PKHeX.Core/PKM/PK2.cs b/PKHeX.Core/PKM/PK2.cs
index 2c42f14d4..25e39d6d2 100644
--- a/PKHeX.Core/PKM/PK2.cs
+++ b/PKHeX.Core/PKM/PK2.cs
@@ -387,7 +387,7 @@ namespace PKHeX.Core
                 CurrentLevel = CurrentLevel,
                 EXP = EXP,
                 Met_Level = CurrentLevel,
-                Nature = (int)(EXP % 25),
+                Nature = Experience.GetNatureVC(EXP),
                 PID = Util.Rand32(),
                 Ball = 4,
                 MetDate = DateTime.Now,
diff --git a/PKHeX.Core/PKM/Util/Experience.cs b/PKHeX.Core/PKM/Util/Experience.cs
new file mode 100644
index 000000000..60cb76f69
--- /dev/null
+++ b/PKHeX.Core/PKM/Util/Experience.cs
@@ -0,0 +1,189 @@
+namespace PKHeX.Core
+{
+    public static class Experience
+    {
+        /// <summary>
+        /// Gets the current level of a species.
+        /// </summary>
+        /// <param name="species">National Dex number of the Pokémon.</param>
+        /// <param name="exp">Experience points</param>
+        /// <returns>Current level of the species.</returns>
+        public static int GetLevel(int species, uint exp)
+        {
+            int growth = PKX.Personal[species].EXPGrowth;
+            int tl = 1; // Initial Level. Iterate upwards to find the level
+            while (ExpTable[++tl, growth] <= exp)
+            {
+                if (tl == 100)
+                    return 100;
+            }
+            return --tl;
+        }
+
+        /// <summary>
+        /// Gets the minimum Experience points for the specified level.
+        /// </summary>
+        /// <param name="level">Current level</param>
+        /// <param name="species">National Dex number of the Pokémon.</param>
+        /// <returns>Experience points needed to have specified level.</returns>
+        public static uint GetEXP(int level, int species)
+        {
+            if (level <= 1)
+                return 0;
+            if (level > 100)
+                level = 100;
+            return ExpTable[level, PKX.Personal[species].EXPGrowth];
+        }
+
+        /// <summary>
+        /// Gets the <see cref="PKM.Nature"/> value for <see cref="PK1"/> / <see cref="PK2"/> entries based on the <see cref="PKM.EXP"/>
+        /// </summary>
+        /// <param name="experience">Current Experience</param>
+        /// <returns>Nature ID (<see cref="Nature"/>)</returns>
+        public static int GetNatureVC(uint experience) => (int)(experience % 25);
+
+        /// <summary>
+        /// Gets the amount of EXP to be earned until the next level-up occurs.
+        /// </summary>
+        /// <param name="level">Current Level</param>
+        /// <param name="species"><see cref="PKM.Species"/></param>
+        /// <returns>Percentage [0,1.00)</returns>
+        public static uint GetEXPToLevelUp(int level, int species)
+        {
+            if (level >= 100)
+                return 0;
+            var growth = PKX.Personal[species].EXPGrowth;
+            var current = ExpTable[level, growth];
+            var next = ExpTable[level + 1, growth];
+            return next - current;
+        }
+
+        /// <summary>
+        /// Gets a percentage for Experience Bar progress indication.
+        /// </summary>
+        /// <param name="level">Current Level</param>
+        /// <param name="species"><see cref="PKM.Species"/></param>
+        /// <param name="exp">Current Experience</param>
+        /// <returns>Percentage [0,1.00)</returns>
+        public static double GetEXPToLevelUpPercentage(int level, int species, uint exp)
+        {
+            if (level >= 100)
+                return 0;
+            var growth = PKX.Personal[species].EXPGrowth;
+            var current = ExpTable[level, growth];
+            var next = ExpTable[level + 1, growth];
+            var amount = next - current;
+            double progress = exp - current;
+            return progress / amount;
+        }
+
+        #region ExpTable
+
+        private static readonly uint[,] ExpTable =
+        {
+            {0000000, 0000000, 0000000, 0000000, 0000000, 0000000},
+            {0000000, 0000000, 0000000, 0000000, 0000000, 0000000},
+            {0000008, 0000015, 0000004, 0000009, 0000006, 0000010},
+            {0000027, 0000052, 0000013, 0000057, 0000021, 0000033},
+            {0000064, 0000122, 0000032, 0000096, 0000051, 0000080},
+            {0000125, 0000237, 0000065, 0000135, 0000100, 0000156},
+            {0000216, 0000406, 0000112, 0000179, 0000172, 0000270},
+            {0000343, 0000637, 0000178, 0000236, 0000274, 0000428},
+            {0000512, 0000942, 0000276, 0000314, 0000409, 0000640},
+            {0000729, 0001326, 0000393, 0000419, 0000583, 0000911},
+            {0001000, 0001800, 0000540, 0000560, 0000800, 0001250},
+            {0001331, 0002369, 0000745, 0000742, 0001064, 0001663},
+            {0001728, 0003041, 0000967, 0000973, 0001382, 0002160},
+            {0002197, 0003822, 0001230, 0001261, 0001757, 0002746},
+            {0002744, 0004719, 0001591, 0001612, 0002195, 0003430},
+            {0003375, 0005737, 0001957, 0002035, 0002700, 0004218},
+            {0004096, 0006881, 0002457, 0002535, 0003276, 0005120},
+            {0004913, 0008155, 0003046, 0003120, 0003930, 0006141},
+            {0005832, 0009564, 0003732, 0003798, 0004665, 0007290},
+            {0006859, 0011111, 0004526, 0004575, 0005487, 0008573},
+            {0008000, 0012800, 0005440, 0005460, 0006400, 0010000},
+            {0009261, 0014632, 0006482, 0006458, 0007408, 0011576},
+            {0010648, 0016610, 0007666, 0007577, 0008518, 0013310},
+            {0012167, 0018737, 0009003, 0008825, 0009733, 0015208},
+            {0013824, 0021012, 0010506, 0010208, 0011059, 0017280},
+            {0015625, 0023437, 0012187, 0011735, 0012500, 0019531},
+            {0017576, 0026012, 0014060, 0013411, 0014060, 0021970},
+            {0019683, 0028737, 0016140, 0015244, 0015746, 0024603},
+            {0021952, 0031610, 0018439, 0017242, 0017561, 0027440},
+            {0024389, 0034632, 0020974, 0019411, 0019511, 0030486},
+            {0027000, 0037800, 0023760, 0021760, 0021600, 0033750},
+            {0029791, 0041111, 0026811, 0024294, 0023832, 0037238},
+            {0032768, 0044564, 0030146, 0027021, 0026214, 0040960},
+            {0035937, 0048155, 0033780, 0029949, 0028749, 0044921},
+            {0039304, 0051881, 0037731, 0033084, 0031443, 0049130},
+            {0042875, 0055737, 0042017, 0036435, 0034300, 0053593},
+            {0046656, 0059719, 0046656, 0040007, 0037324, 0058320},
+            {0050653, 0063822, 0050653, 0043808, 0040522, 0063316},
+            {0054872, 0068041, 0055969, 0047846, 0043897, 0068590},
+            {0059319, 0072369, 0060505, 0052127, 0047455, 0074148},
+            {0064000, 0076800, 0066560, 0056660, 0051200, 0080000},
+            {0068921, 0081326, 0071677, 0061450, 0055136, 0086151},
+            {0074088, 0085942, 0078533, 0066505, 0059270, 0092610},
+            {0079507, 0090637, 0084277, 0071833, 0063605, 0099383},
+            {0085184, 0095406, 0091998, 0077440, 0068147, 0106480},
+            {0091125, 0100237, 0098415, 0083335, 0072900, 0113906},
+            {0097336, 0105122, 0107069, 0089523, 0077868, 0121670},
+            {0103823, 0110052, 0114205, 0096012, 0083058, 0129778},
+            {0110592, 0115015, 0123863, 0102810, 0088473, 0138240},
+            {0117649, 0120001, 0131766, 0109923, 0094119, 0147061},
+            {0125000, 0125000, 0142500, 0117360, 0100000, 0156250},
+            {0132651, 0131324, 0151222, 0125126, 0106120, 0165813},
+            {0140608, 0137795, 0163105, 0133229, 0112486, 0175760},
+            {0148877, 0144410, 0172697, 0141677, 0119101, 0186096},
+            {0157464, 0151165, 0185807, 0150476, 0125971, 0196830},
+            {0166375, 0158056, 0196322, 0159635, 0133100, 0207968},
+            {0175616, 0165079, 0210739, 0169159, 0140492, 0219520},
+            {0185193, 0172229, 0222231, 0179056, 0148154, 0231491},
+            {0195112, 0179503, 0238036, 0189334, 0156089, 0243890},
+            {0205379, 0186894, 0250562, 0199999, 0164303, 0256723},
+            {0216000, 0194400, 0267840, 0211060, 0172800, 0270000},
+            {0226981, 0202013, 0281456, 0222522, 0181584, 0283726},
+            {0238328, 0209728, 0300293, 0234393, 0190662, 0297910},
+            {0250047, 0217540, 0315059, 0246681, 0200037, 0312558},
+            {0262144, 0225443, 0335544, 0259392, 0209715, 0327680},
+            {0274625, 0233431, 0351520, 0272535, 0219700, 0343281},
+            {0287496, 0241496, 0373744, 0286115, 0229996, 0359370},
+            {0300763, 0249633, 0390991, 0300140, 0240610, 0375953},
+            {0314432, 0257834, 0415050, 0314618, 0251545, 0393040},
+            {0328509, 0267406, 0433631, 0329555, 0262807, 0410636},
+            {0343000, 0276458, 0459620, 0344960, 0274400, 0428750},
+            {0357911, 0286328, 0479600, 0360838, 0286328, 0447388},
+            {0373248, 0296358, 0507617, 0377197, 0298598, 0466560},
+            {0389017, 0305767, 0529063, 0394045, 0311213, 0486271},
+            {0405224, 0316074, 0559209, 0411388, 0324179, 0506530},
+            {0421875, 0326531, 0582187, 0429235, 0337500, 0527343},
+            {0438976, 0336255, 0614566, 0447591, 0351180, 0548720},
+            {0456533, 0346965, 0639146, 0466464, 0365226, 0570666},
+            {0474552, 0357812, 0673863, 0485862, 0379641, 0593190},
+            {0493039, 0367807, 0700115, 0505791, 0394431, 0616298},
+            {0512000, 0378880, 0737280, 0526260, 0409600, 0640000},
+            {0531441, 0390077, 0765275, 0547274, 0425152, 0664301},
+            {0551368, 0400293, 0804997, 0568841, 0441094, 0689210},
+            {0571787, 0411686, 0834809, 0590969, 0457429, 0714733},
+            {0592704, 0423190, 0877201, 0613664, 0474163, 0740880},
+            {0614125, 0433572, 0908905, 0636935, 0491300, 0767656},
+            {0636056, 0445239, 0954084, 0660787, 0508844, 0795070},
+            {0658503, 0457001, 0987754, 0685228, 0526802, 0823128},
+            {0681472, 0467489, 1035837, 0710266, 0545177, 0851840},
+            {0704969, 0479378, 1071552, 0735907, 0563975, 0881211},
+            {0729000, 0491346, 1122660, 0762160, 0583200, 0911250},
+            {0753571, 0501878, 1160499, 0789030, 0602856, 0941963},
+            {0778688, 0513934, 1214753, 0816525, 0622950, 0973360},
+            {0804357, 0526049, 1254796, 0844653, 0643485, 1005446},
+            {0830584, 0536557, 1312322, 0873420, 0664467, 1038230},
+            {0857375, 0548720, 1354652, 0902835, 0685900, 1071718},
+            {0884736, 0560922, 1415577, 0932903, 0707788, 1105920},
+            {0912673, 0571333, 1460276, 0963632, 0730138, 1140841},
+            {0941192, 0583539, 1524731, 0995030, 0752953, 1176490},
+            {0970299, 0591882, 1571884, 1027103, 0776239, 1212873},
+            {1000000, 0600000, 1640000, 1059860, 0800000, 1250000},
+        };
+
+        #endregion
+    }
+}
diff --git a/PKHeX.Core/PKM/Util/PKX.cs b/PKHeX.Core/PKM/Util/PKX.cs
index 2fcb26b41..ff2acc387 100644
--- a/PKHeX.Core/PKM/Util/PKX.cs
+++ b/PKHeX.Core/PKM/Util/PKX.cs
@@ -61,112 +61,6 @@ namespace PKHeX.Core
 
         public static uint LCRNG(uint seed) => RNG.LCRNG.Next(seed);
         public static uint LCRNG(ref uint seed) => seed = RNG.LCRNG.Next(seed);
-        #region ExpTable
-        private static readonly uint[,] ExpTable =
-        {
-            {0, 0, 0, 0, 0, 0},
-            {0, 0, 0, 0, 0, 0},
-            {8, 15, 4, 9, 6, 10},
-            {27, 52, 13, 57, 21, 33},
-            {64, 122, 32, 96, 51, 80},
-            {125, 237, 65, 135, 100, 156},
-            {216, 406, 112, 179, 172, 270},
-            {343, 637, 178, 236, 274, 428},
-            {512, 942, 276, 314, 409, 640},
-            {729, 1326, 393, 419, 583, 911},
-            {1000, 1800, 540, 560, 800, 1250},
-            {1331, 2369, 745, 742, 1064, 1663},
-            {1728, 3041, 967, 973, 1382, 2160},
-            {2197, 3822, 1230, 1261, 1757, 2746},
-            {2744, 4719, 1591, 1612, 2195, 3430},
-            {3375, 5737, 1957, 2035, 2700, 4218},
-            {4096, 6881, 2457, 2535, 3276, 5120},
-            {4913, 8155, 3046, 3120, 3930, 6141},
-            {5832, 9564, 3732, 3798, 4665, 7290},
-            {6859, 11111, 4526, 4575, 5487, 8573},
-            {8000, 12800, 5440, 5460, 6400, 10000},
-            {9261, 14632, 6482, 6458, 7408, 11576},
-            {10648, 16610, 7666, 7577, 8518, 13310},
-            {12167, 18737, 9003, 8825, 9733, 15208},
-            {13824, 21012, 10506, 10208, 11059, 17280},
-            {15625, 23437, 12187, 11735, 12500, 19531},
-            {17576, 26012, 14060, 13411, 14060, 21970},
-            {19683, 28737, 16140, 15244, 15746, 24603},
-            {21952, 31610, 18439, 17242, 17561, 27440},
-            {24389, 34632, 20974, 19411, 19511, 30486},
-            {27000, 37800, 23760, 21760, 21600, 33750},
-            {29791, 41111, 26811, 24294, 23832, 37238},
-            {32768, 44564, 30146, 27021, 26214, 40960},
-            {35937, 48155, 33780, 29949, 28749, 44921},
-            {39304, 51881, 37731, 33084, 31443, 49130},
-            {42875, 55737, 42017, 36435, 34300, 53593},
-            {46656, 59719, 46656, 40007, 37324, 58320},
-            {50653, 63822, 50653, 43808, 40522, 63316},
-            {54872, 68041, 55969, 47846, 43897, 68590},
-            {59319, 72369, 60505, 52127, 47455, 74148},
-            {64000, 76800, 66560, 56660, 51200, 80000},
-            {68921, 81326, 71677, 61450, 55136, 86151},
-            {74088, 85942, 78533, 66505, 59270, 92610},
-            {79507, 90637, 84277, 71833, 63605, 99383},
-            {85184, 95406, 91998, 77440, 68147, 106480},
-            {91125, 100237, 98415, 83335, 72900, 113906},
-            {97336, 105122, 107069, 89523, 77868, 121670},
-            {103823, 110052, 114205, 96012, 83058, 129778},
-            {110592, 115015, 123863, 102810, 88473, 138240},
-            {117649, 120001, 131766, 109923, 94119, 147061},
-            {125000, 125000, 142500, 117360, 100000, 156250},
-            {132651, 131324, 151222, 125126, 106120, 165813},
-            {140608, 137795, 163105, 133229, 112486, 175760},
-            {148877, 144410, 172697, 141677, 119101, 186096},
-            {157464, 151165, 185807, 150476, 125971, 196830},
-            {166375, 158056, 196322, 159635, 133100, 207968},
-            {175616, 165079, 210739, 169159, 140492, 219520},
-            {185193, 172229, 222231, 179056, 148154, 231491},
-            {195112, 179503, 238036, 189334, 156089, 243890},
-            {205379, 186894, 250562, 199999, 164303, 256723},
-            {216000, 194400, 267840, 211060, 172800, 270000},
-            {226981, 202013, 281456, 222522, 181584, 283726},
-            {238328, 209728, 300293, 234393, 190662, 297910},
-            {250047, 217540, 315059, 246681, 200037, 312558},
-            {262144, 225443, 335544, 259392, 209715, 327680},
-            {274625, 233431, 351520, 272535, 219700, 343281},
-            {287496, 241496, 373744, 286115, 229996, 359370},
-            {300763, 249633, 390991, 300140, 240610, 375953},
-            {314432, 257834, 415050, 314618, 251545, 393040},
-            {328509, 267406, 433631, 329555, 262807, 410636},
-            {343000, 276458, 459620, 344960, 274400, 428750},
-            {357911, 286328, 479600, 360838, 286328, 447388},
-            {373248, 296358, 507617, 377197, 298598, 466560},
-            {389017, 305767, 529063, 394045, 311213, 486271},
-            {405224, 316074, 559209, 411388, 324179, 506530},
-            {421875, 326531, 582187, 429235, 337500, 527343},
-            {438976, 336255, 614566, 447591, 351180, 548720},
-            {456533, 346965, 639146, 466464, 365226, 570666},
-            {474552, 357812, 673863, 485862, 379641, 593190},
-            {493039, 367807, 700115, 505791, 394431, 616298},
-            {512000, 378880, 737280, 526260, 409600, 640000},
-            {531441, 390077, 765275, 547274, 425152, 664301},
-            {551368, 400293, 804997, 568841, 441094, 689210},
-            {571787, 411686, 834809, 590969, 457429, 714733},
-            {592704, 423190, 877201, 613664, 474163, 740880},
-            {614125, 433572, 908905, 636935, 491300, 767656},
-            {636056, 445239, 954084, 660787, 508844, 795070},
-            {658503, 457001, 987754, 685228, 526802, 823128},
-            {681472, 467489, 1035837, 710266, 545177, 851840},
-            {704969, 479378, 1071552, 735907, 563975, 881211},
-            {729000, 491346, 1122660, 762160, 583200, 911250},
-            {753571, 501878, 1160499, 789030, 602856, 941963},
-            {778688, 513934, 1214753, 816525, 622950, 973360},
-            {804357, 526049, 1254796, 844653, 643485, 1005446},
-            {830584, 536557, 1312322, 873420, 664467, 1038230},
-            {857375, 548720, 1354652, 902835, 685900, 1071718},
-            {884736, 560922, 1415577, 932903, 707788, 1105920},
-            {912673, 571333, 1460276, 963632, 730138, 1140841},
-            {941192, 583539, 1524731, 995030, 752953, 1176490},
-            {970299, 591882, 1571884, 1027103, 776239, 1212873},
-            {1000000, 600000, 1640000, 1059860, 800000, 1250000},
-        };
-        #endregion
 
         /// <summary>
         /// Species name lists indexed by the <see cref="PKM.Language"/> value.
@@ -322,11 +216,7 @@ namespace PKHeX.Core
         /// <returns>Current level of the species.</returns>
         public static int GetLevel(int species, uint exp)
         {
-            int growth = Personal[species].EXPGrowth;
-            int tl = 1; // Initial Level. Iterate upwards to find the level
-            while (ExpTable[++tl, growth] <= exp)
-                if (tl == 100) return 100;
-            return --tl;
+            return Experience.GetLevel(species, exp);
         }
 
         /// <summary>
@@ -337,9 +227,7 @@ namespace PKHeX.Core
         /// <returns>Experience points needed to have specified level.</returns>
         public static uint GetEXP(int level, int species)
         {
-            if (level <= 1) return 0;
-            if (level > 100) level = 100;
-            return ExpTable[level, Personal[species].EXPGrowth];
+            return Experience.GetEXP(level, species);
         }
 
         /// <summary>
diff --git a/PKHeX.WinForms/Controls/SAV Editor/SlotChangeManager.cs b/PKHeX.WinForms/Controls/SAV Editor/SlotChangeManager.cs
index fba6dfac5..20b4d74b9 100644
--- a/PKHeX.WinForms/Controls/SAV Editor/SlotChangeManager.cs	
+++ b/PKHeX.WinForms/Controls/SAV Editor/SlotChangeManager.cs	
@@ -219,7 +219,7 @@ namespace PKHeX.WinForms.Controls
             }
             var set = new ShowdownSet(pk);
             if (pk.Format <= 2) // Nature preview from IVs
-                set.Nature = (int)(pk.EXP % 25);
+                set.Nature = Experience.GetNatureVC(pk.EXP);
             ShowSet.SetToolTip(pb, set.LocalizedText(Settings.Default.Language));
         }
 
@@ -280,7 +280,7 @@ namespace PKHeX.WinForms.Controls
             Array.Resize(ref dragdata, SAV.SIZE_STORED);
             PKM pkx = SAV.GetPKM(dragdata);
             string fn = pkx.FileName; fn = fn.Substring(0, fn.LastIndexOf('.'));
-            string filename = $"{fn}{(encrypt ? $".ek{pkx.Format}" : $".{pkx.Extension}")}";
+            string filename = fn + (encrypt ? $".ek{pkx.Format}" : $".{pkx.Extension}");
 
             // Make File
             string newfile = Path.Combine(Path.GetTempPath(), Util.CleanFileName(filename));