How to clear save data for GBA (specifically FFTA)

I thought there was a button combination that cleared a game's save data...can't remember what it is though. I bought a copy of Final Fantasy Tactics Advance used, and it's got two save files filled up. I could make a new one, but the other one would still be there, and that...bugs me. Is there a universal "clear memory" button combination I could be putting in as the game boots up?

-Cheers

Throw the game at the wall as hard as you possibly can... That should do the trick!paul_hubans

yea I hear that works all the time