diff --git a/BaseClasses.py b/BaseClasses.py
index 4691ef4b..19725779 100644
--- a/BaseClasses.py
+++ b/BaseClasses.py
@@ -3656,7 +3656,7 @@ bigkeyshuffle_mode = {'none': 0, 'off': 0, 'nearby': 2, 'wild': 3, 'on': 3}
 # byte 8: HHHD DPEE (enemy_health, enemy_dmg, potshuffle, enemies)
 e_health = {"default": 0, "easy": 1, "normal": 2, "hard": 3, "expert": 4}
 e_dmg = {"default": 0, "shuffled": 1, "random": 2}
-enemy_mode = {"none": 0, "shuffled": 1, "chaos": 2, "random": 2, "legacy": 3}
+enemy_mode = {"none": 0, "shuffled": 1, "chaos": 2, "random": 2, "mimics": 3}
 
 # byte 9: RRAA ABBB (restrict boss mode, algorithm, boss shuffle)
 rb_mode = {"none": 0, "mapcompass": 1, "dungeon": 2}
diff --git a/resources/app/cli/args.json b/resources/app/cli/args.json
index 8b9fa77c..54fea6cb 100644
--- a/resources/app/cli/args.json
+++ b/resources/app/cli/args.json
@@ -587,7 +587,8 @@
   "shuffleenemies": {
     "choices": [
       "none",
-      "shuffled"
+      "shuffled",
+      "mimics"
     ]
   },
   "enemy_health": {
@@ -638,4 +639,4 @@
   "outputname": {},
   "notes": {},
   "code": {}
-}
\ No newline at end of file
+}
diff --git a/source/enemizer/Enemizer.py b/source/enemizer/Enemizer.py
index 90c7ef34..c71fed59 100644
--- a/source/enemizer/Enemizer.py
+++ b/source/enemizer/Enemizer.py
@@ -3,6 +3,7 @@ from Utils import snes_to_pc
 
 from source.dungeon.EnemyList import SpriteType, EnemySprite, sprite_translation
 from source.dungeon.RoomList import Room010C
+from source.enemizer.SpecialEnemyModes import get_enemy_map_uw, get_enemy_map_ow
 from source.enemizer.SpriteSheets import sub_group_choices
 from source.enemizer.SpriteSheets import randomize_underworld_sprite_sheets, randomize_overworld_sprite_sheets
 from source.enemizer.TilePattern import tile_patterns
@@ -427,7 +428,8 @@ skip_sprites = {
 def randomize_enemies(world, player):
     if world.enemy_shuffle[player] != 'none':
         data_tables = world.data_tables[player]
-        custom_uw, custom_ow = {}, {}
+        custom_ow = get_enemy_map_ow(world.enemy_shuffle[player], data_tables)
+        custom_uw = get_enemy_map_uw(world.enemy_shuffle[player], data_tables)
         enemy_map = world.customizer.get_enemies() if world.customizer else None
         if enemy_map and player in enemy_map:
             if 'Underworld' in enemy_map[player]:
diff --git a/source/enemizer/SpecialEnemyModes.py b/source/enemizer/SpecialEnemyModes.py
new file mode 100644
index 00000000..8e0df1cb
--- /dev/null
+++ b/source/enemizer/SpecialEnemyModes.py
@@ -0,0 +1,46 @@
+from source.dungeon.EnemyList import EnemySprite, SpriteType, sprite_translation, enemy_names
+
+def can_combine_req(req1, req2):
+    for i in range(0, 4):
+        if req1.sub_groups[i] and req2.sub_groups[i]:
+            if len(set(req1.sub_groups[i]).intersection(req2.sub_groups[i])) == 0:
+                return False
+    return True
+
+def get_enemy_map(mode, reqs, vanilla_map):
+    data = {}
+
+    if mode != "mimics":
+        return data
+
+    green_mimic = reqs.get((EnemySprite.GreenMimic, 0))
+
+    for room_id, sprites in vanilla_map.items():
+        data[room_id] = {}
+        for idx, sprite in enumerate(sprites):
+            subtype = 0 if sprite.sub_type != SpriteType.Overlord else sprite.sub_type
+            req = reqs.get((sprite.kind, subtype))
+            if not req or isinstance(req, dict) or req.boss:
+                continue
+            if req.static:
+                if not can_combine_req(green_mimic, req):
+                    data[room_id] = {}
+                    break
+                continue
+            if req.killable:
+                data[room_id][idx] = 'GreenMimic'
+            else:
+                data[room_id][idx] = enemy_names[sprite.kind]
+        if len(data[room_id]) == 0:
+            del data[room_id]
+    return data
+
+
+def get_enemy_map_ow(mode, data_tables):
+    reqs = data_tables.sprite_requirements
+    return get_enemy_map(mode, reqs, data_tables.ow_enemy_table)
+
+def get_enemy_map_uw(mode, data_tables):
+    reqs = data_tables.sprite_requirements
+    return get_enemy_map(mode, reqs, data_tables.uw_enemy_table.room_map)
+