Last as in, by its release date, not as in "I bought Mario Galaxy 1 in 2014", though I suppose you could add that too if you want.

For me, Epic Mickey 2, 18th November 2012. Bad choice; I enjoyed the first one but the second sucked the sweat off a camel's bollocks. Should've quit after the excellent Project Zero 2 Wii Edition in June 2012 and ended on a high note.

Pretty sure it was Pandora's Tower

Skyward Sword of course. There wasn't anything good after that.

I remember it was Skyward Sword.

I think mine was Skyward Sword as well. I'd have to look at a release calendar and see what came out after that to be sure.

I’d argue the best game on the system came out after that, at least in North America: Xenoblade Chronicles.

Same as most people, I guess.

The Legend of Zelda: Skyward Sword

And I didn't like it..

I feel your pain. Epic Mickey is one of the best games on Wii; the sequel was a hot mess.

Anyway, for me it’s Rodea the Sky Soldier (November 2015). It came bundled with the WiiU version.

And everywhere else in the world it came out before Skyward Sword... in Japan mid 2010.

The last one I boughtif you don't consider those on the eShop of the Wii U was Sonic Colors. No regrets,the last truly really good Sonic game.