Wii U Virtual Console saves incompatible with Wii saves

When you buy the Wii U version of a Virtual Console game – currently, Balloon Fight is the only one available – you get a new version of that game. That means GamePad controls, access to a Miiverse community, and the great customization options afforded to Wii U VC games.

It also means your old Wii saves are incompatible. Nintendo told Kotaku that when you transfer your games from Wii to Wii U, 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. For Balloon Fight, that's not such a big deal, but it's important you're aware of that before you try to pick back up in a longer game.