diff --git a/data/events/happiness_probabilities.asm b/data/events/happiness_probabilities.asm
index f67db07f3..e25adf268 100644
--- a/data/events/happiness_probabilities.asm
+++ b/data/events/happiness_probabilities.asm
@@ -1,12 +1,12 @@
 HappinessData_OlderHaircutBrother:
-	db  30 percent,     2, HAPPINESS_OLDERCUT1 ; 30% chance
-	db  50 percent + 1, 3, HAPPINESS_OLDERCUT2 ; 50% chance
-	db 100 percent,     4, HAPPINESS_OLDERCUT3 ; 20% chance
+	db 30 percent,     2, HAPPINESS_OLDERCUT1 ; 30% chance
+	db 50 percent + 1, 3, HAPPINESS_OLDERCUT2 ; 50% chance
+	db -1,             4, HAPPINESS_OLDERCUT3 ; 20% chance
 
 HappinessData_YoungerHaircutBrother:
-	db  60 percent + 1, 2, HAPPINESS_YOUNGCUT1 ; 60% chance
-	db  30 percent,     3, HAPPINESS_YOUNGCUT2 ; 30% chance
-	db 100 percent,     4, HAPPINESS_YOUNGCUT3 ; 10% chance
+	db 60 percent + 1, 2, HAPPINESS_YOUNGCUT1 ; 60% chance
+	db 30 percent,     3, HAPPINESS_YOUNGCUT2 ; 30% chance
+	db -1,             4, HAPPINESS_YOUNGCUT3 ; 10% chance
 
 HappinessData_DaisysGrooming:
-	db 100 percent,     2, HAPPINESS_GROOMING ; 99.6% chance
+	db -1,             2, HAPPINESS_GROOMING ; 99.6% chance
diff --git a/docs/bugs_and_glitches.md b/docs/bugs_and_glitches.md
index 5192f1f1b..41411100a 100644
--- a/docs/bugs_and_glitches.md
+++ b/docs/bugs_and_glitches.md
@@ -1990,9 +1990,9 @@ CopyPokemonName_Buffer1_Buffer3:
 
 ```diff
  HappinessData_DaisysGrooming:
--	db 100 percent,     2, HAPPINESS_GROOMING ; 99.6% chance
-+	db 50 percent + 1,  2, HAPPINESS_GROOMING ; 50% chance
-+	db 100 percent,     2, HAPPINESS_GROOMING ; 50% chance
+-	db -1,             2, HAPPINESS_GROOMING ; 99.6% chance
++	db 50 percent,     2, HAPPINESS_GROOMING ; 50% chance
++	db -1,             2, HAPPINESS_GROOMING ; 50% chance
 ```