I've managed to successfully inject my flash cart's save into the wii u (new super mario bros). it's a little more difficult than n64 saves. I had to reduce the file size from 512KBs to 8KBs by trimming everything until 1FFF in hex (8,192 bytes or the same size as a psx save exactly). then, I injected just the save with saviine, not the save state or rest mode save or else it will load and replicate the save from before. it took me a moment to figure that out. anyway, saved settings for the game will be reset, which I think might be what the .conf file is for. however, it works.