I want to delete all the saved data on my game and start over

its varies from game to game but your online games account save account information online like levels etc

the files you speak of are saved on the wii's internal memory.
Wii

1. Start the Wii console. Once the system starts, you will be taken to the Channel Page.
2. Open the System Menu. There you will see a saved item for each time you've saved a game.
3. Find the game you want to delete. Be sure to check the time on each save to make sure that you do not delete the wrong one.
4. Once you've located the proper save, select it with the A button on the Wiimote. You will then see an option to Copy, Move, or Delete.
5. Select Delete to delete that save.

OR
Wii U

1. Select System Settings from the Wii U Menu.
2. Scroll to the Data Management and press the A Button.
3. Select the application that has the data you wish to delete and press the A Button.
4. Select the data from within the application and press the A Button. If you wish to delete everything, press the Y Button to Delete All.

Unfortunately, you are going to have to delete all the files for the game off the console and start over.

This could be a problem regarding your game data/save data. You could try deleting the game data and save data of CoD: MW2 on your system. Go to Game Data Utility and Saved Data Utility and delete everything pertaining to Cod: MW2 including any corrupt data. Once that is over, try running the game again.
You should also make sure that your game is updated. If you start up the game and the game is asking for an update, then you should update your game and try running it again.
If you game is not updated, try updating it before doing the game data/save data. If it works, you no longer need to delete the save/game data.
Reference: http://community.us.playstation.com/thread/1629758?start=0&tstart=0

Okay look its not a modem at all! Its a corrupted file you gotta. Hold the ps3 power button and let it turn off. Then remove finger and do it again until u hear a beep keep holdingg and when u hear 2 rapid beeps release button and it will give u options to chose . Go to restore file and click it. And boom its fixed it will not delete anything at all promise. I jus had this happen today and I did this and it worked wonderful. So jave fun and keep playing!!! :D

In order to delete a save file, you must press Up/Left, B, and Select at the same time at the main screen. In HeartGold/Soul Silver, you cannot overwrited save data by making a new file.

I'm not sure there is a way to delete all data. One way might be to hit A, B, X, Y, L, and R, but I can't guarantee that will work. If not, just let Amazon know that the data cannot be deleted and they can just overwrite the save data with a new game.

All Wii games and Wii Channels that create a save file (such as for game progress, high scores, channel settings) that can be deleted or copied.

To delete save game data

1. Access the Wii Data Management screen (how to).
2. Select the "Save Data" icon to display all save files.
3. Select the file you want to delete.
4. Select "Erase" to delete the file.
Warning: If a game save file is deleted, there is no way to get it back. Be sure you want to delete it, or even copy it to an SD Card if necessary.

Go to the Wii option on your homepage, choose data > save data and you can erase the force unleashed data here

Okay, first thing, this game does not actually have an option for deleting saved games. Silly, I know.

That being said, there is -a- way to delete saved data, though I do not recommend it because of possible damage to your cart. The best option is to simply start a new game and save it over your last.

If you still feel the need to delete your saved data, you can follow this procedure "at your own risk".

Start the game.
Load the saved file you want deleted.
Once the game is up, go to save the game again.
Select your save and hit "Save".
Now eject the game while its saving.
Restart the game, and try to load your save slot.
You should receive an error about the save being corrupted and deleted.