Wii U versions of a Virtual Console game – currently, Balloon Fight is the only one available – are completely new versions of that game, and that means old Wii saves you may have are incompatible with the new version.
Nintendo has told Kotaku that when you transfer their games from Wii to Wii U and then update to the new Wii U version of the game, you won't be able to use your save file on the Wii U version.
While Balloon Fight isn't a game that makes such a thing a big deal, it's important to be aware of this when picking up a longer, more involved game.
By Nathan Misa
Ben said: Screw you Nintendo.