Wii U Retail • nothing last week • Game & Wario (Sunday; also on eShop)
Wii Retail • nothing last week or this week
Wii U eShop • Yoshi (last Wednesday; 30 cents for first 30 days) • Mario Bros. (NES, $4.99) • Wrecking Crew (NES, $4.99) • Mutant Mudds Deluxe (last Thursday, $9.99) • New Super Mario Bros U DLC: Super Luigi U (Thursday, $19.99)
Wii Virtual Console/WiiWare (Thursday) • nothing last week or this week
I don't know what the problem is, but you can give the codes to Nook & he'll give you the game right away. The 1st code I got I mailed out, and it took ~3 days to get the game back, but ever since then I've just been giving the code to Nook.