diff --git a/src/mars_patcher/mf/auto_generated_types.py b/src/mars_patcher/mf/auto_generated_types.py
index 1a78eae..35f83bb 100644
--- a/src/mars_patcher/mf/auto_generated_types.py
+++ b/src/mars_patcher/mf/auto_generated_types.py
@@ -605,6 +605,9 @@ class Marsschemamf(typ.TypedDict, total=False):
     DisableDemos: bool = False
     """Disables title screen demos when true."""
 
+    InstantUnmorph: bool = False
+    """When true, enables instant unmorphing via the SELECT button."""
+
     SkipDoorTransitions: bool = False
     """Makes all door transitions instant when true."""
 
diff --git a/src/mars_patcher/mf/data/schema.json b/src/mars_patcher/mf/data/schema.json
index 8d44b26..09e842d 100644
--- a/src/mars_patcher/mf/data/schema.json
+++ b/src/mars_patcher/mf/data/schema.json
@@ -551,6 +551,11 @@
             "description": "Disables title screen demos when true.",
             "default": false
         },
+        "InstantUnmorph": {
+            "type": "boolean",
+            "description": "When true, enables instant unmorphing via the SELECT button.",
+            "default": false
+        },
         "SkipDoorTransitions": {
             "type": "boolean",
             "description": "Makes all door transitions instant when true.",
diff --git a/src/mars_patcher/mf/misc_patches.py b/src/mars_patcher/mf/misc_patches.py
index 9ea6513..7cf18b6 100644
--- a/src/mars_patcher/mf/misc_patches.py
+++ b/src/mars_patcher/mf/misc_patches.py
@@ -91,3 +91,7 @@ def apply_reveal_unexplored_doors(rom: Rom) -> None:
 
 def apply_accessibility_patch(rom: Rom) -> None:
     apply_patch_in_asm_path(rom, "accessibility.ips")
+
+
+def apply_instant_unmorph_patch(rom: Rom) -> None:
+    apply_patch_in_asm_path(rom, "instant_unmorph.ips")
diff --git a/src/mars_patcher/mf/patcher.py b/src/mars_patcher/mf/patcher.py
index fe61f17..2a2a812 100644
--- a/src/mars_patcher/mf/patcher.py
+++ b/src/mars_patcher/mf/patcher.py
@@ -17,6 +17,7 @@
 from mars_patcher.mf.misc_patches import (
     apply_accessibility_patch,
     apply_base_patch,
+    apply_instant_unmorph_patch,
     apply_pbs_without_bombs,
     apply_reveal_hidden_tiles,
     apply_reveal_unexplored_doors,
@@ -134,6 +135,9 @@ def patch_mf(
     if patch_data.get("DisableDemos"):
         disable_demos(rom)
 
+    if patch_data.get("InstantUnmorph"):
+        apply_instant_unmorph_patch(rom)
+
     if patch_data.get("SkipDoorTransitions"):
         skip_door_transitions(rom)