diff --git a/Data/Sys/GameSettings/GC6.ini b/Data/Sys/GameSettings/GC6.ini
index bfd8192c3d..f6ca5ca4b6 100644
--- a/Data/Sys/GameSettings/GC6.ini
+++ b/Data/Sys/GameSettings/GC6.ini
@@ -14,3 +14,7 @@
 
 [Video_Settings]
 SafeTextureCacheColorSamples = 0
+# Many areas of the game have unused vertexes, especially with cutscenes
+# involving Shadow Pokémon, such as the purification cutscene.
+# CPU Cull ends up greatly boosting performance for these cases. 
+CPUCull = True
diff --git a/Data/Sys/GameSettings/GXX.ini b/Data/Sys/GameSettings/GXX.ini
index 46c08f74a6..257ba7e7ad 100644
--- a/Data/Sys/GameSettings/GXX.ini
+++ b/Data/Sys/GameSettings/GXX.ini
@@ -19,3 +19,7 @@ MMU = True
 [Video_Settings]
 # Fixes garbled text.
 SafeTextureCacheColorSamples = 0
+# Many areas of the game have unused vertexes, especially with cutscenes
+# involving Shadow Pokémon, such as the purification cutscene.
+# CPU Cull ends up greatly boosting performance for these cases. 
+CPUCull = True