it wont let me save

[Butterbean]

Either you have a pirated copy or the save battery is dead. D:
Is your game kinda old?

eh,there is a save battery?0_0

Yes, there's one inside the cartridge. It's not meant to go over 5-6 years, though.
If you have a console repairs shop in your neighbourhood, they might be able to repair the cartridge (for what it worth...).

:O Learn something new everyday!
I had no idea the saving part had a battery.

[Beloved]

I can save I made a new game and all I play it on the DS does the save battery matter when you
play it on the DS:?: