At the request/advice of some of the forum members, I have modified my button tester app to test other thing as well.
As you can see I have based its visual style
on that of the Wii menu.
Current features are_
1. Button Test
2. Stylus Test
3. Wifi Test (Not implemented)
4. Boot GBA (Not Implemented)
5. Microphone Test
6. Speaker Test
7. Stuck Pixel Fixer
8. Power Down the DS (No icon yet)
The two blue circles at the bottom will both be used as buttons, one to return to the main menu, the other undecided (perhaps credits?). The current time is also displayed.
The download will be available when the app if finished, sinse I don't know how to boot GBA or Wifi test, it might be some time.