A: No. The file structures and encryption are completely different. There is no converter.
Some Wii saves are "locked" and cannot be moved via the standard menu. If you see a greyed-out copy button, you may need to use SaveGame Manager GX (requires Homebrew) to bypass the restriction. Wwe 13 Save Data Wii
: Many players use pre-made save files to instantly unlock the 80+ roster members. Wwe 13 Save Data Wii
Appendix B — Glossary
Wii save files are tied to the console’s unique encryption key. Copies made via simple file transfer won’t work unless you use a tool that resigns the save. Wwe 13 Save Data Wii