diff --git a/cmd/txttocode/templates.go b/cmd/txttocode/templates.go
index cdb98b5..3e855dc 100644
--- a/cmd/txttocode/templates.go
+++ b/cmd/txttocode/templates.go
@@ -109,26 +109,6 @@ func MonStatsFlagsForID(id ID) (MonStatsFlags, bool) {
 	flags, ok := MonStatsFlagsByID[id]
 	return flags, ok
 }
-
-func IsUndead(id ID) bool {
-	flags, ok := MonStatsFlagsForID(id)
-	return ok && (flags.IsLUndead || flags.IsHUndead)
-}
-
-func IsDemon(id ID) bool {
-	flags, ok := MonStatsFlagsForID(id)
-	return ok && flags.IsDemon
-}
-
-func IsBeast(id ID) bool {
-	flags, ok := MonStatsFlagsForID(id)
-	return ok && !flags.IsLUndead && !flags.IsHUndead && !flags.IsDemon
-}
-
-func IsUndeadOrDemon(id ID) bool {
-	flags, ok := MonStatsFlagsForID(id)
-	return ok && (flags.IsLUndead || flags.IsHUndead || flags.IsDemon)
-}
 `
 
 const templateEntrances = `// Code generated by cmd/txttocode. DO NOT EDIT.
diff --git a/pkg/data/npc.go b/pkg/data/npc.go
index 4ee95a0..1edcca3 100644
--- a/pkg/data/npc.go
+++ b/pkg/data/npc.go
@@ -203,3 +203,23 @@ func (m Monster) IsEscapingType() bool {
 	}
 	return false
 }
+
+func (m Monster) IsUndead() bool {
+	flags, ok := npc.MonStatsFlagsForID(m.Name)
+	return ok && (flags.IsLUndead || flags.IsHUndead)
+}
+
+func (m Monster) IsDemon() bool {
+	flags, ok := npc.MonStatsFlagsForID(m.Name)
+	return ok && flags.IsDemon
+}
+
+func (m Monster) IsBeast() bool {
+	flags, ok := npc.MonStatsFlagsForID(m.Name)
+	return ok && !flags.IsLUndead && !flags.IsHUndead && !flags.IsDemon
+}
+
+func (m Monster) IsUndeadOrDemon() bool {
+	flags, ok := npc.MonStatsFlagsForID(m.Name)
+	return ok && (flags.IsLUndead || flags.IsHUndead || flags.IsDemon)
+}
diff --git a/pkg/data/npc/monstats.go b/pkg/data/npc/monstats.go
index 9248fe3..4fccdc4 100644
--- a/pkg/data/npc/monstats.go
+++ b/pkg/data/npc/monstats.go
@@ -771,23 +771,3 @@ func MonStatsFlagsForID(id ID) (MonStatsFlags, bool) {
 	flags, ok := MonStatsFlagsByID[id]
 	return flags, ok
 }
-
-func IsUndead(id ID) bool {
-	flags, ok := MonStatsFlagsForID(id)
-	return ok && (flags.IsLUndead || flags.IsHUndead)
-}
-
-func IsDemon(id ID) bool {
-	flags, ok := MonStatsFlagsForID(id)
-	return ok && flags.IsDemon
-}
-
-func IsBeast(id ID) bool {
-	flags, ok := MonStatsFlagsForID(id)
-	return ok && !flags.IsLUndead && !flags.IsHUndead && !flags.IsDemon
-}
-
-func IsUndeadOrDemon(id ID) bool {
-	flags, ok := MonStatsFlagsForID(id)
-	return ok && (flags.IsLUndead || flags.IsHUndead || flags.IsDemon)
-}