diff --git a/asm/code_806CD90.s b/asm/code_806CD90.s
index 040cc3189..fc34120ec 100644
--- a/asm/code_806CD90.s
+++ b/asm/code_806CD90.s
@@ -2030,7 +2030,7 @@ _0806E040:
 	ldr r1, _0806E0C0
 	adds r0, r1
 	ldrb r0, [r0]
-	bl IsDungeonUnk1
+	bl DoEnemiesEvolveWhenKOed
 	lsls r0, 24
 	cmp r0, 0
 	beq _0806E066
diff --git a/include/dungeon.h b/include/dungeon.h
index 3fc27fd1c..73a3b72fc 100644
--- a/include/dungeon.h
+++ b/include/dungeon.h
@@ -12,7 +12,9 @@ struct DungeonName
 struct DungeonDataEntry
 {
     /* 0x0 */ bool8 stairDirectionUp;
-    /* 0x1 */ bool8 unk1;
+    // If enabled, enemies will evolve when a team member is KOed (and doesn't revive) if their evolution spawns on the floor.
+    // False for all dungeons, but the code still works if this flag is enabled.
+    /* 0x1 */ bool8 enemiesEvolveWhenKOed;
     /* 0x2 */ bool8 recruitingEnabled;
     /* 0x3 */ s8 rescuesAllowed;
     /* 0x4 */ u8 maxItemsAllowed;
@@ -24,7 +26,9 @@ struct DungeonDataEntry
     /* 0xA */ bool8 enterWithoutGameSave; // If false, the dungeon will force a quicksave before entering.
     /* 0xB */ u8 HMMask; // HM mask for dungeon entry requirements (Fly, Dive, Waterfall, Surf, Water).
     /* 0xC */ s16 turnLimit;
-    /* 0xE */ s16 randomMovementChance; // The chance that a wild Pokémon's moveRandomly flag will be set when spawning, causing them to move randomly inside a room instead of exploring rooms.
+    // The chance that a wild Pokémon's moveRandomly flag will be set when spawning,
+    // causing them to move randomly inside a room instead of exploring rooms.
+    /* 0xE */ s16 randomMovementChance;
 };
 
 extern struct DungeonDataEntry gDungeons[];
diff --git a/src/dungeon.c b/src/dungeon.c
index 395f80a96..ec4a5f55e 100644
--- a/src/dungeon.c
+++ b/src/dungeon.c
@@ -159,7 +159,7 @@ void RestoreDungeonLocation(struct unkStruct_8094924* r0, struct DungeonLocation
     RestoreIntegerBits(r0, &r1->floor, 0x7);
 }
 
-bool8 IsDungeonUnk1(u8 dungeon)
+bool8 DoEnemiesEvolveWhenKOed(u8 dungeon)
 {
-    return gDungeons[dungeon].unk1;
+    return gDungeons[dungeon].enemiesEvolveWhenKOed;
 }
diff --git a/tools/dungeonjson/dungeonjson.cpp b/tools/dungeonjson/dungeonjson.cpp
index 71a6cb030..ddf4dbf65 100644
--- a/tools/dungeonjson/dungeonjson.cpp
+++ b/tools/dungeonjson/dungeonjson.cpp
@@ -765,7 +765,7 @@ string generate_dungeon_data_text(Json data) {
     text << "gDungeons:";
     for (Json data_entry : data.array_items()) {
         text << read_json_bool(data_entry["stairDirectionUp"])
-            << read_json_bool(data_entry["unk1"])
+            << read_json_bool(data_entry["enemiesEvolveWhenKOed"])
             << read_json_bool(data_entry["recruitingEnabled"])
             << read_json_int(data_entry["rescuesAllowed"], 1)
             << read_json_int(data_entry["maxItemsAllowed"], 1)