Add comment about pokedex reordering

src/pokemon.c

@@ -88,6 +88,9 @@ static const struct CombinedMove sCombinedMoves[2] =
     {0xFFFF, 0xFFFF, 0xFFFF}
 };
 
+// NOTE: The order of the elements in the 3 arrays below is irrelevant.
+// To reorder the pokedex, see the values in include/constants/pokedex.h.
+
 #define SPECIES_TO_HOENN(name)      [SPECIES_##name - 1] = HOENN_DEX_##name
 #define SPECIES_TO_NATIONAL(name)   [SPECIES_##name - 1] = NATIONAL_DEX_##name
 #define HOENN_TO_NATIONAL(name)     [HOENN_DEX_##name - 1] = NATIONAL_DEX_##name