Emulator

Game Name?

Mario Kart Wii

Game ID? (right click the game in the game list, Properties, Info tab)

RMCE01

MD5 Hash? (right click the game in the game list, Properties, Verify tab, Verify Integrity button)

bed6205940851d1b7c2156eb525efd7f (wiimmfi patched)
bb7f2c926cbcdee65e2a48b7002a52ea (unmodified iso)

What's the problem? Describe what went wrong.

When connecting to Wiimmfi on the latest developer build the following messagebox will appear twice:

Warning
Unknown Pointer 0x3fffffff PC 0x8015d39c LR 0x80126624

What steps will reproduce the problem?

Patch your Mario Kart Wii ISO with the Wiimmfi patcher
Connect to Wiimmfi
Witness the error

Is the issue present in the latest development version? For future reference, please also write down the version number of the latest development version.

Present on the developer version:
5.0-21303

Is the issue present in the latest stable version?

No, 5.0 is incompatible with Wiimmfi.

If the issue isn't present in the latest stable version, which is the first broken version? (You can find the first broken version by bisecting. Windows users can use the tool https://forums.dolphin-emu.org/Thread-green-notice-development-thread-unofficial-dolphin-bisection-tool-for-finding-broken-builds and anyone who is building Dolphin on their own can use git bisect.)

5.0-21299

If your issue is a graphical issue, please attach screenshots and record a three frame fifolog of the issue if possible. Screenshots showing what it is supposed to look like from either console or older builds of Dolphin will help too. For more information on how to use the fifoplayer, please check here: https://wiki.dolphin-emu.org/index.php?title=FifoPlayer

What are your PC specifications? (CPU, GPU, Operating System, more)

AMD Ryzen 7 5700X
NVIDIA GeForce RTX 3060
Microsoft Windows 11 Version 23H2

Is there anything else that can help developers narrow down the issue? (e.g. logs, screenshots,
configuration files, savefiles, savestates)

Issue present on both JIT and Interpreter
You must provide a NAND backup of your Wii to use the Wiimmfi service
All emulation hacks and enhancements are disabled and the issue is still present
I haven't tested other games