Title: The Legacy of the Brighthouse: Preserving WWE '13 Wii Save Data
Back it up. Move it, don't copy it. And if all else fails, download the 100% save.
You can find safe, community-verified save files on these popular gaming databases:
Yes, but with nuance. The Wii U has vWii (virtual Wii mode). WWE ‘13 Wii save data works identically on the Wii U’s vWii system. However: Wwe 13 Wii Save Data