This usually occurs if a download was interrupted or if the save file was created on a vastly different version of the Dolphin emulator. Try re-downloading the file from a trusted source like GameFAQs or dedicated Wii backup communities. To help find the perfect file for your setup, let me know:
If you have followed the folder structure correctly but the file doesn't appear, the issue may be with the file's "archive bit." wwe 13 wii save file
Some versions allow unlocking the "WWE Championship" (Attitude Era) by entering OhHellYeah in the cheat menu, though most characters still require gameplay. 🚀 Advanced Modding (Homebrew) This usually occurs if a download was interrupted