diff --git a/worlds/jakanddaxter/Rules.py b/worlds/jakanddaxter/Rules.py
index d312e9f051..5aa3d041ca 100644
--- a/worlds/jakanddaxter/Rules.py
+++ b/worlds/jakanddaxter/Rules.py
@@ -46,8 +46,8 @@ def count_reachable_orbs_global(state: CollectionState,
                                 world: JakAndDaxterWorld) -> int:
 
     accessible_orbs = 0
-    for level_name in world.level_to_regions:
-        for region in world.level_to_regions[level_name]:
+    for level_regions in world.level_to_regions.values():
+        for region in level_regions:
             # Rely on short-circuiting to skip region.can_reach whenever possible.
             if region.orb_count > 0 and region.can_reach(state):
                 accessible_orbs += region.orb_count
diff --git a/worlds/jakanddaxter/__init__.py b/worlds/jakanddaxter/__init__.py
index dd731db9f4..b453d01fcd 100644
--- a/worlds/jakanddaxter/__init__.py
+++ b/worlds/jakanddaxter/__init__.py
@@ -1,4 +1,5 @@
 # Python standard libraries
+from collections import defaultdict
 from math import ceil
 from typing import Any, ClassVar, Callable, Union, cast
 
@@ -232,9 +233,7 @@ class JakAndDaxterWorld(World):
     def generate_early(self) -> None:
 
         # Initialize the level-region dictionary.
-        self.level_to_regions = {}
-        for level_name in level_table:
-            self.level_to_regions[level_name] = []
+        self.level_to_regions = defaultdict(list)
 
         # Cache the power cell threshold values for quicker reference.
         self.power_cell_thresholds = [
@@ -315,9 +314,9 @@ class JakAndDaxterWorld(World):
         from .Regions import create_regions
         create_regions(self)
 
-        for level in self.level_to_regions:
-            for region in self.level_to_regions[level]:
-                self.multiworld.regions.append(region)
+        # Don't forget to add the created regions to the multiworld!
+        for level_regions in self.level_to_regions.values():
+            self.multiworld.regions.extend(level_regions)
 
         # from Utils import visualize_regions
         # visualize_regions(self.multiworld.get_region("Menu", self.player), "jakanddaxter.puml")