You can now transfer the game when moving data from Wii to Wii U. If you never owned the game, but have Wii U, you can now buy the game in Wii Mode's Wii Shopping Channel.
Even though I owned the game on Wii, I rebought it in Wii U's Wii Mode. I don't know if I would be able to do a second system transfer and even if I could, I didn't want to risk breaking Wii Mode just for the one game here.
So...yeah. The game is movable to Wii U's Wii Mode and buyable in Wii Mode's Wii Shopping Channel. The sequel was always movable to and buyable in Wii U's Wii Mode by the way.
Edited by Ngamer01, 26 April 2014 - 09:53 AM.