Yes, but only on WiiFlow. GX tries to run the Wii game then throws me back to HC. CFG doesn't even list the Wii games, only GC games :| So I never tried CFG with nothing.
To recap:
1. GX lists both WII and GC. Wii throws back to HC. GC loads but nintendont now throws the DSI exception, yesterday loaded Mario Sunshine but got stuck after the video (intro) and had to restart Wii with power cable; that is, I was never able to move Mario not even once.
2. WiiFlow only lists Wii. Loads Wii just fine (tried with Mario Galaxy 2 and Skyward Sword), was able to play the games a bit and even save.
3. CFG (usb loader) lists only GC games. Since it won't even show Wii games and I cannot see option to nintendont or anything I never tried it for anything.
4. SD (1 GB, non SDHC) card contains all apps. "controllers" folder is on root of USB (Canvio 3.0 1 TB, single FAT32 partition, 23KB cluster size).
5. On USB I have GC games (/games/title [id]/game.iso) with 1:1 ISOs, I have WBFS (/wbfs/title [id]/title [id].wbfs). USB is connected to upper rear port, if Wii U was laying down. Not using Y cable, assume I don't need one since it loads apps fine and was able to run Wii games properly.
6. Using latest revisions of WiiFlow, GX and CFG, as downloaded in the "Easy Guide to Softmod" from here (GbaTemp) and updated internally each when available.
7. I have tried nintendont r228, r247, r239. r228 was the only one that worked so far (1) but now not even that one works.