How to Reset Your Progress in New Super Mario Bros. DS

There is no "reset everything" cheat for New Super Mario Bros. DS. The Nintendo DS's security architecture prevents most cheat devices from functioning. To start a completely fresh game:

• Access the game's settings or options menu.
• Select the option to delete save data.
• Confirm the deletion—this action is permanent and irreversible.
• The game will then prompt you to begin a new adventure.

Make sure you are ready to lose all progress before proceeding.