When I try to save in Heartgold, it says the following: "Error saving data. Backup memory has failed. The game may be played but it will be impossible to save. Please turn off power." Please help. I know for a fact that my copy is a legitimate copy.
So I successfully updated A9LH to B9S (after not using the 3ds for 4 months...), but when I power on my 3ds, brings me an error. How do I get rid of this error?