You can find pre-completed save files on community hubs like GameFAQs or specialized forums like Smacktalks .
To use a downloaded save file (often found on sites like GameFAQs or specialized forums), follow these steps: Wwe 13 Save Data Wii
save data on the involves understanding how to store, back up, and utilize existing save files to unlock the game's deep roster and "Attitude Era" content. Save Data Location and Structure WWE '13 Save Data (Wii) — Noteworthy Digest
Since the save is copy-protected, you cannot just drag it to an SD card and use the Wii menu. You must: Power loss during write
Appendix A — Quick Reference Commands and Menus
Use SaveGame Manager GX ’s “resign” feature, or use FE100 (a PC tool) to re-encrypt the save for your new Wii’s NAND.