diff --git a/include/constants/pokemon.h b/include/constants/pokemon.h
index 8e76a9aba4..eef34716f4 100644
--- a/include/constants/pokemon.h
+++ b/include/constants/pokemon.h
@@ -46,31 +46,31 @@
 #define EGG_GROUPS_PER_MON            2
 
 // Pokémon natures
-#define NATURE_HARDY    0
-#define NATURE_LONELY   1
-#define NATURE_BRAVE    2
-#define NATURE_ADAMANT  3
-#define NATURE_NAUGHTY  4
-#define NATURE_BOLD     5
-#define NATURE_DOCILE   6
-#define NATURE_RELAXED  7
-#define NATURE_IMPISH   8
-#define NATURE_LAX      9
-#define NATURE_TIMID    10
-#define NATURE_HASTY    11
-#define NATURE_SERIOUS  12
-#define NATURE_JOLLY    13
-#define NATURE_NAIVE    14
-#define NATURE_MODEST   15
-#define NATURE_MILD     16
-#define NATURE_QUIET    17
-#define NATURE_BASHFUL  18
-#define NATURE_RASH     19
-#define NATURE_CALM     20
-#define NATURE_GENTLE   21
-#define NATURE_SASSY    22
-#define NATURE_CAREFUL  23
-#define NATURE_QUIRKY   24
+#define NATURE_HARDY    0 // Neutral
+#define NATURE_LONELY   1 // +Atk -Def
+#define NATURE_BRAVE    2 // +Atk -Speed
+#define NATURE_ADAMANT  3 // +Atk -SpAtk
+#define NATURE_NAUGHTY  4 // +Atk -SpDef
+#define NATURE_BOLD     5 // +Def -Atk
+#define NATURE_DOCILE   6 // Neutral
+#define NATURE_RELAXED  7 // +Def -Speed
+#define NATURE_IMPISH   8 // +Def -SpAtk
+#define NATURE_LAX      9 // +Def -SpDef
+#define NATURE_TIMID    10 // +Speed -Atk
+#define NATURE_HASTY    11 // +Speed -Def
+#define NATURE_SERIOUS  12 // Neutral
+#define NATURE_JOLLY    13 // +Speed -SpAtk
+#define NATURE_NAIVE    14 // +Speed - SpDef
+#define NATURE_MODEST   15 // +SpAtk -Atk
+#define NATURE_MILD     16 // +SpAtk -Def
+#define NATURE_QUIET    17 // +SpAtk -Speed
+#define NATURE_BASHFUL  18 // Neutral
+#define NATURE_RASH     19 // +SpAtk -SpDef
+#define NATURE_CALM     20 // +SpDef -Atk
+#define NATURE_GENTLE   21 // +SpDef -Def
+#define NATURE_SASSY    22 // +SpDef -Speed
+#define NATURE_CAREFUL  23 // +SpDef -SpAtk
+#define NATURE_QUIRKY   24 // Neutral
 #define NUM_NATURES     25
 
 // Pokémon Stats