SternDust

Long story short a friend of mine had to sell his 3DS a while ago and forgot to backup his save with his favorite pokemon in there. I'm trying to see if I can get the data of his pokemons through a previous battle we had before he sold his 3DS, but I'm positive that I didn't save the info of our battle in the VS Recoder. Is there any way for me to obtain the data of his pokemons? Or is a lost cause?