All weight class championship belts unlocked and defended.

Ensure the downloaded folder name matches your game's region code exactly.

That depends on you! If you enjoy the progression of the Career Mode, it might feel less rewarding. However, if you only play exhibition matches against friends, a 100% save is ideal. My save data is corrupted, what can I do?

However, the specific save data you need to manage for backing up or modifying your game is much smaller and is located in a specific folder on your PSP's memory stick.

Sometimes, the data can be fixed by simply moving it between folders on the memory stick.