diff --git a/src/pokemon.c b/src/pokemon.c
index ab36c3e7fb..751825e43e 100644
--- a/src/pokemon.c
+++ b/src/pokemon.c
@@ -4554,7 +4554,7 @@ u16 NationalPokedexNumToSpecies(u16 nationalNum)
     if (species == NUM_SPECIES)
         return NATIONAL_DEX_NONE;
 
-    return species;
+    return GET_BASE_SPECIES_ID(species);
 }
 
 u16 NationalToHoennOrder(u16 nationalNum)