Items Lost Due To Multiple Crashes

[Hattori961]

THIS has happened twice in a row in exactly the same spot during the johto elite 4 battle at the 3rd stage, i get halfway through the 3rd battle and the game freezes and crashes, 

It resets me back to the start upon relog

My pokemon all restored but the revives and potions i have spent money on do not get reset meaning the game is just eating my items and cash, this is extremely frustrating considering it happened exactly the same time during the same battle, I've lost alot of money already and will avoid the elite 4 until the problem has been rectified, please get in touch, thank you for your time.