ok i know that u can download saved files 4 the psp so heres my question if u download a saved file of bbsfm with out having the final mix, but u have bbs can i use the final mix save to fight the extra bosses and if i can, can anyone give me a link to a final mix saved file

KHBBS and KHBBSFM are two different games. It won't work.

As JTD95 said, they are two different games. The extra bosses in FM are not on the BBS UMD at all and FM is Japanese anyways. There is no way it will work, you need FM to play a FM save.

just buy the game! http://www.play-asia.com/Kingdom_Hearts_Birth_by_Sleep_Final_Mix/paOS-13-71-9f-49-en-70-41km.html

Of course u can't it's like saying can I use the final fantasy Dissidia save in khbbs