How to – Delete the save file ( Animal Crossing New Leaf )!
Completely erasing your save file
Launch Animal Crossing: New Leaf from the Nintendo 3DS home menu.
Right after the Nintendo 3DS logo loading screen, press and hold the ÒA,Ó ÒB,Ó ÒXÓ and ÒYÓ buttons.
Select ÒYesÓ when prompted to delete your save file.