If you want to stay on the legal side, use homebrew ROMs instead.
We’ll be covering the Windows version of DeSmuME.
Fetch the latest Windows binary from theirwebsite.
You should have downloaded aziparchive.
Browse to your nds file, and hitOpen.
it’s possible for you to find the various key bindings in theConfig > Control Config.
A window will pop up, asking for the number of bytes and search jot down.
For our example, we’ll stick with the defaults.
You’ll be prompted to enter a value.
The window will tell you the number of results.
end the dialog (do not click Restart).
Change the number of lives.
We went in and lost a life to reduce the number of lives we had to 9.
The number of results should have dropped significantly (I ended up with 4).
Either way, once you’re done, hitView, and select each value and clickAdd.
you’ve got the option to either freeze the value, or change it.
I opted to freeze it, and clickedAdd.
That’s all - for a more detailed guide, viewDeSmuME’s guide.