2. Turn the DS over and remove the small screws holding the battery access cover
3. Remove the battery
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remove the battery for about 15 seconds then it will ask to put in some settings and info.
No, it doesn't. The only way you can reset a Nintendo DS is to turn it off and turn it back on again (hard reset).
You will have to delete any saved files for that game to reset it and start from the beginning. You can do this by accessing the memory section of the Nintendo DS.
Remove the battery for about 10 seconds. Then put it back in, and your DS/DSLite/DSi has been reset.
go to settings, its in the menu and change it there.