Found this one in my Hyrule Warriors Legends for 3DS package, maybe someone have use for it : r/wiiu
Hyrule Warriors Legends/DLC | Koei Wiki | Fandom
Hyrule Warriors Legends for Nintendo 3DS - Nintendo
Hyrule Warriors - WiiU transfer code (found in the 3DS box) (all the info you need) | ZD Forums - Zelda Dungeon Forums
Hyrule Warriors Legends | Ultimate Pop Culture Wiki | Fandom
Bought Hyrule Warriors Legends, but I don't have a Wii U nor do I plan to ever get one. Here's the code to unlock the legends characters in the Wii U version
Here's how the Hyrule Warriors 3DS to Wii U transfer process works – Destructoid
Hyrule Warriors: new update available (Ver. 1.8.0) - Perfectly Nintendo