/// THE UNIVERSAL CHILD'S PLAY PATCH WAS UPDATED!! ///
How to play "Yu-Gi-Oh! 5D's World Championship 2010" on your DSTT and R4
1. Download Patch.rarand get a Patch.exe file from the RAR archive.
2. Drag your ROM and drop it onto the Patch.exe. That's all.
Note: This path is not only for " Yu-Gi-Oh! 5D's World Championship 2010". It's one of game to be patched by Universal Child's Play Patch.
The file having the ".bak" extension is the backup copy of the original nds file.
Credit to Rudolph.
I used that patch and still got the black screen after going into 5D story mode and trying to start a duel in world championship mode. I'm using a M3 real running a M3 Sakura firmware version 1.45.