diff --git a/PKHeX.Core/Legality/RNG/ClassicEra/Gen4/MethodJ.cs b/PKHeX.Core/Legality/RNG/ClassicEra/Gen4/MethodJ.cs
index a481cab1b..e214afe6f 100644
--- a/PKHeX.Core/Legality/RNG/ClassicEra/Gen4/MethodJ.cs
+++ b/PKHeX.Core/Legality/RNG/ClassicEra/Gen4/MethodJ.cs
@@ -102,10 +102,8 @@ private static bool CheckEncounterActivation<T>(T enc, ref LeadSeed result)
                 if (!IsValidCoronetB1F(s4, ref result.Seed))
                     return false;
             }
-            // D/P don't reference Suction Cups or Sticky Hold.
-            return enc is IVersion { Version: Pt }
-                ? IsFishPossible(enc.Type, ref result.Seed, ref result.Lead)
-                : IsFishPossible(enc.Type, ref result.Seed);
+            // D/P/Pt don't update the rod rate boost for Suction Cups or Sticky Hold correctly.
+            return IsFishPossible(enc.Type, ref result.Seed);
         }
         // Can sweet scent trigger.
         return true;
@@ -471,31 +469,6 @@ private static bool IsFishPossible(SlotType4 encType, ref uint seed)
         return false;
     }
 
-    private static bool IsFishPossible(SlotType4 encType, ref uint seed, ref LeadRequired lead)
-    {
-        var rodRate = GetRodRate(encType);
-        var u16 = seed >> 16;
-        var roll = u16 / 656;
-        if (roll < rodRate)
-        {
-            seed = LCRNG.Prev(seed);
-            return true;
-        }
-
-        if (lead != None)
-            return false;
-
-        // Suction Cups / Sticky Hold
-        if (roll < rodRate * 2)
-        {
-            seed = LCRNG.Prev(seed);
-            lead = SuctionCups;
-            return true;
-        }
-
-        return false;
-    }
-
     private static byte GetRodRate(SlotType4 type) => type switch
     {
         Old_Rod => 25,
diff --git a/PKHeX.Core/Legality/RNG/ClassicEra/Gen4/MethodK.cs b/PKHeX.Core/Legality/RNG/ClassicEra/Gen4/MethodK.cs
index 0e272884a..fec5ead12 100644
--- a/PKHeX.Core/Legality/RNG/ClassicEra/Gen4/MethodK.cs
+++ b/PKHeX.Core/Legality/RNG/ClassicEra/Gen4/MethodK.cs
@@ -498,12 +498,16 @@ private static bool IsFishPossible(SlotType4 encType, ref uint seed, ref LeadReq
         var rodRate = GetRodRate(encType);
         var u16 = seed >> 16;
         var roll = u16 % 100;
-        if (roll < rodRate)
+
+        // HG/SS: Lead (Following) Pokémon with >= 250 adds +50 to the rate. Assume the best case.
+        rodRate += 50; // This happens before Suction Cups / Sticky Hold, can be compounded.
+        if (roll < rodRate) // This will always succeed for Good/Super rod due to the base+bonus being >=100
         {
             seed = LCRNG.Prev(seed);
             return true;
         }
 
+        // Old Rod might reach here (75% < 100%)
         if (lead != None)
             return false;
 
@@ -514,20 +518,25 @@ private static bool IsFishPossible(SlotType4 encType, ref uint seed, ref LeadReq
             lead = SuctionCups;
             return true;
         }
-
         return false;
     }
 
+    // Lead is something else, and cannot be changed. Does the same as the above method without a ref LeadRequired.
     private static bool IsFishPossible(SlotType4 encType, ref uint seed)
     {
-        var rate = GetRodRate(encType);
+        var rodRate = GetRodRate(encType);
         var u16 = seed >> 16;
         var roll = u16 % 100;
-        if (roll < rate)
+
+        // HG/SS: Lead (Following) Pokémon with >= 250 adds +50 to the rate. Assume the best case.
+        rodRate += 50; // This happens before Suction Cups / Sticky Hold, can be compounded.
+        if (roll < rodRate) // This will always succeed for Good/Super rod due to the base+bonus being >=100
         {
             seed = LCRNG.Prev(seed);
             return true;
         }
+
+        // Old Rod might reach here (75% < 100%)
         return false;
     }
 
diff --git a/PKHeX.Core/Legality/RNG/ClassicEra/Gen4/SlotMethodK.cs b/PKHeX.Core/Legality/RNG/ClassicEra/Gen4/SlotMethodK.cs
index 2d5c2d474..f3ba41f58 100644
--- a/PKHeX.Core/Legality/RNG/ClassicEra/Gen4/SlotMethodK.cs
+++ b/PKHeX.Core/Legality/RNG/ClassicEra/Gen4/SlotMethodK.cs
@@ -59,7 +59,7 @@ public static class SlotMethodK
         < 70 => 1, // 40,69 (30%)
         < 85 => 2, // 70,84 (15%)
         < 95 => 3, // 85,94 (10%)
-          99 => 4, //    95 ( 5%)
+        <100 => 4, //    95 ( 5%)
            _ => Invalid,
     };