The save file acts as a container for your entire WWE '13 experience:
Save data is region-locked (e.g., an NTSC save won't work on a PAL disc). 🕹️ What is Stored in the Save? Wwe 13 Save Data Wii
If you have downloaded a save file (often to unlock all fighters or arenas), you must place it correctly on your SD card for the Wii to recognize it: Backup and Restore Saves & Miis (In Depth) The save file acts as a container for
file downloaded from the internet and install it directly into the Wii’s system memory. Priiloader Wwe 13 Save Data Wii
Most users will need to accept the risk and simply be diligent about not interrupting saves.