I would hack my wiiu but I haven't got a copy of smash anymore and twilight princess which I do have does not work anymore, nevermind thanks anyway.
There are a few other games that still can be used to hack a Wii U's vWii mode.
The following games can be used:
LEGO Indiana Jones
LEGO Batman
LEGO Star Wars
Tales of Symphonia: Dawn of the New World
Yu-Gi-Oh 5D's Wheelie Breakers