diff --git a/include/constants/species.h b/include/constants/species.h
index 89098e6b6..02c141ca7 100644
--- a/include/constants/species.h
+++ b/include/constants/species.h
@@ -812,6 +812,8 @@
 #define SPECIES_MELTAN 808
 #define SPECIES_MELMETAL 809
 
+#define IS_ULTRA_BEAST(speciesId)((speciesId >= SPECIES_NIHILEGO && speciesId <= SPECIES_GUZZLORD) || (speciesId >= SPECIES_POIPOLE && speciesId <= SPECIES_BLACEPHALON))
+
 // Megas
 #define SPECIES_MEGA_AMPHAROS 810
 #define SPECIES_MEGA_VENUSAUR 811