diff --git a/tools/libcart/cat.py b/tools/libcart/cat.py
new file mode 100644
index 0000000000..4f5d0f0ac2
--- /dev/null
+++ b/tools/libcart/cat.py
@@ -0,0 +1,88 @@
+#!/usr/bin/env python3
+
+import sys
+
+_ULTRA64 = False
+src = sys.argv[1].endswith(".c")
+with open(sys.argv[1], "w") as f:
+	if src:
+		f.write("/*"+"*"*76+"*/\n")
+		lib = "libultra" if _ULTRA64 else "libdragon"
+		url = "https://github.com/devwizard64/libcart"
+		f.write("/*"+("Adapted for use with "+lib+" - "+url).center(76)+"*/\n")
+		f.write("/*"+"*"*76+"*/\n")
+		f.write("\n")
+		if _ULTRA64:
+			f.write("#include <ultra64.h>\n")
+			f.write("#include <cart.h>\n")
+		else:
+			f.write("#include \"n64types.h\"\n")
+			f.write("#include \"n64sys.h\"\n")
+			f.write("#include \"dma.h\"\n")
+			f.write("#include \"libcart/cart.h\"\n")
+		f.write("\n")
+	flag = True
+	for path in sys.argv[2:]:
+		code = 0
+		for line in open(path, "r"):
+			if src:
+				if line.startswith("extern"):
+					if "__os" not in line: continue
+				if (
+					line.startswith("void __") or
+					line.startswith("int __") or
+					line.startswith("unsigned char __") or
+					line.startswith("u32 __") or
+					line.startswith("u64 __")
+				): line = "static "+line
+			if line == "#ifdef __GNUC__\n":
+				if not _ULTRA64:
+					code = 2
+					continue
+			if line == "#ifdef _ULTRA64\n":
+				code = 2 if _ULTRA64 else 3
+				continue
+			if line == "#ifndef _ULTRA64\n":
+				code = 3 if _ULTRA64 else 2
+				continue
+			if line.startswith("#else"):
+				if code & 2:
+					code ^= 1
+					continue
+			if line.startswith("#endif"):
+				if code & 2:
+					code = 0
+					continue
+			if code & 1: continue
+			if _ULTRA64:
+				line = line.replace("u_uint64_t", "u64")
+				line = line.replace("uint16_t", "u16")
+				line = line.replace("uint32_t", "u32")
+				line = line.replace("uint64_t", "u64")
+			else:
+				if line.startswith("typedef"): continue
+				if line.startswith("#define __cart_"): continue
+				line = line.replace("u16", "uint16_t")
+				line = line.replace("u32", "uint32_t")
+				line = line.replace("u64", "uint64_t")
+				line = line.replace("__cart_rd", "io_read")
+				line = line.replace("__cart_wr", "io_write")
+				if line.startswith("#define IO_WRITE"):
+					line = line[:28] + "\\\n\t\t" + line[28:]
+				if line == "__attribute__((aligned(16)))\n":
+					line = line[:-1] + " "
+				line = line.replace("\t", "    ")
+			if src:
+				if line.startswith("#include "): continue
+				if line.endswith("_H__\n"):
+					if line.startswith("#ifndef __"): continue
+					if line.startswith("#define __"): continue
+				if line.endswith("_H__ */\n"):
+					if line.startswith("#endif /* __"): continue
+			if line == "\n":
+				if not flag:
+					flag = True
+					f.write(line)
+			else:
+				flag = False
+				f.write(line)
diff --git a/tools/libcart/update-libcart.sh b/tools/libcart/update-libcart.sh
new file mode 100755
index 0000000000..74492a9ba0
--- /dev/null
+++ b/tools/libcart/update-libcart.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+set -euo pipefail
+rm -rf libcart/
+git clone --quiet https://github.com/devwizard64/libcart
+python cat.py ../../src/libcart/cart.c libcart/src/*.c
+python cat.py ../../src/libcart/cart.h libcart/include/*.h
+echo Libcart updated to version $(git -C libcart rev-parse HEAD)