The DLC for Fight Night Champion on PS3 is generally bundled into several key packs that expand the roster and gameplay modes:
If your base game is the "Best of PS3" version or a standard release, ensure the DLC repack is compatible with that specific Title ID. fight night champion ps3 dlc pkg repack
New patches have been released to enable 60 FPS gameplay on the PS3 emulator (RPCS3), making the game run more smoothly than the original console hardware. Installation Notes for PKG/Repacks The DLC for Fight Night Champion on PS3
Check: