diff --git a/src/mercury_engine_data_structures/cli.py b/src/mercury_engine_data_structures/cli.py
index 211870bb..044b93b9 100644
--- a/src/mercury_engine_data_structures/cli.py
+++ b/src/mercury_engine_data_structures/cli.py
@@ -8,11 +8,15 @@
 from pathlib import Path
 from typing import Optional
 
+import construct
+
 from mercury_engine_data_structures import formats
 from mercury_engine_data_structures.construct_extensions.json import convert_to_raw_python
 from mercury_engine_data_structures.file_tree_editor import FileTreeEditor
 from mercury_engine_data_structures.game_check import Game
 
+construct.setGlobalPrintFullStrings(True)
+
 
 def game_argument_type(s: str) -> Game:
     try:
diff --git a/src/mercury_engine_data_structures/formats/__init__.py b/src/mercury_engine_data_structures/formats/__init__.py
index bcf3488b..acf4c8c9 100644
--- a/src/mercury_engine_data_structures/formats/__init__.py
+++ b/src/mercury_engine_data_structures/formats/__init__.py
@@ -13,6 +13,7 @@
 from mercury_engine_data_structures.formats.bmsbk import Bmsbk
 from mercury_engine_data_structures.formats.bmscc import Bmscc
 from mercury_engine_data_structures.formats.bmscu import Bmscu
+from mercury_engine_data_structures.formats.bmsem import Bmsem
 from mercury_engine_data_structures.formats.bmses import Bmses
 from mercury_engine_data_structures.formats.bmsld import Bmsld
 from mercury_engine_data_structures.formats.bmslgroup import Bmslgroup
@@ -58,6 +59,7 @@
     "BMSCC": Bmscc,
     "BMSCD": Bmscc,
     "BMSCU": Bmscu,
+    "BMSEM": Bmsem,
     "BMSLD": Bmsld,
     "BMSMSD": Bmsmsd,
     "BMSNAV": Bmsnav,
diff --git a/src/mercury_engine_data_structures/formats/bmsem.py b/src/mercury_engine_data_structures/formats/bmsem.py
new file mode 100644
index 00000000..fa685eab
--- /dev/null
+++ b/src/mercury_engine_data_structures/formats/bmsem.py
@@ -0,0 +1,43 @@
+import construct
+from construct import (
+    Array,
+    Const,
+    Construct,
+    Float32l,
+    Int16ul,
+    Int32ul,
+    Struct,
+)
+
+from mercury_engine_data_structures.common_types import StrId, make_vector
+from mercury_engine_data_structures.formats import BaseResource
+from mercury_engine_data_structures.game_check import Game
+
+VectorArray = Array(3, Float32l)
+
+BMSEM = Struct(
+    _magic=Const(b"MSEM"),
+    unk1=Int16ul,
+    unk2=Int16ul,
+    things= make_vector(Struct(
+            "layer_name" / StrId,
+            "objects" / make_vector(Struct(
+                "whatever_name" / StrId,
+                # "unk1" / Int32ul
+                "inner_things" / make_vector(Struct(
+                    "first_part" / StrId,
+                    "second_part" / StrId,
+                    "unk3" / Int32ul,
+                    "unk4" / Int32ul,
+                    "unk6" / Int32ul,
+                    "unk7" / Int32ul
+                ))
+            ))
+    )),
+    rest=construct.GreedyBytes,
+)
+
+class Bmsem(BaseResource):
+    @classmethod
+    def construct_class(cls, target_game: Game) -> Construct:
+        return BMSEM
diff --git a/tests/formats/test_bmsem.py b/tests/formats/test_bmsem.py
new file mode 100644
index 00000000..9e91de71
--- /dev/null
+++ b/tests/formats/test_bmsem.py
@@ -0,0 +1,12 @@
+import pytest
+from tests.test_lib import parse_build_compare_editor
+
+from mercury_engine_data_structures import samus_returns_data
+from mercury_engine_data_structures.formats.bmsem import Bmsem
+
+all_sr_bmsmsd = [name for name in samus_returns_data.all_name_to_asset_id().keys()
+                   if name.endswith(".bmsem")]
+
+@pytest.mark.parametrize("bmsmsd_path", all_sr_bmsmsd)
+def test_bmsem(samus_returns_tree, bmsmsd_path):
+    parse_build_compare_editor(Bmsem, samus_returns_tree, bmsmsd_path, print_data=True)