diff --git a/pk3DS/Subforms/RSTE.cs b/pk3DS/Subforms/RSTE.cs
index 04b0fa3..29724cc 100644
--- a/pk3DS/Subforms/RSTE.cs
+++ b/pk3DS/Subforms/RSTE.cs
@@ -704,7 +704,8 @@ private void Randomize()
                     if (mevo && p == CB_numPokemon.SelectedIndex - 1)
                     {
                         int[] megastones = GetMegaStones(trpk_pkm[p].SelectedIndex);
-                        trpk_item[p].SelectedIndex = megastones[rnd32() % megastones.Length];
+                        if (megastones.Length > 0)
+                            trpk_item[p].SelectedIndex = megastones[rnd32() % megastones.Length];
                     }
                     else if (rItem)
                         #region RandomItem
diff --git a/pk3DS/Subforms/TrainerRand.cs b/pk3DS/Subforms/TrainerRand.cs
index e2dcbba..de29806 100644
--- a/pk3DS/Subforms/TrainerRand.cs
+++ b/pk3DS/Subforms/TrainerRand.cs
@@ -88,9 +88,9 @@ private void CHK_RandomPKM_CheckedChanged(object sender, EventArgs e)
             GB_Tweak.Enabled = 
                 CHK_G1.Checked = CHK_G2.Checked = CHK_G3.Checked = 
                 CHK_G4.Checked = CHK_G5.Checked = CHK_G6.Checked = 
-                CHK_L.Checked = CHK_E.Checked = 
+                CHK_L.Checked = CHK_E.Checked = CHK_StoryMEvos.Checked = 
                 CHK_RandomPKM.Checked;
-            CHK_BST.Checked = false; // Off by default
+            CHK_BST.Checked = CHK_TypeTheme.Checked = CHK_GymTrainers.Checked = false; // Off by default
         }
 
         private void CHK_Level_CheckedChanged(object sender, EventArgs e)