What are the most "I can't believe this is made/published by Nintendo" games in your view, and why?

[LegitHyperbole]

There were a few exclusives on WIi that I was surprised by, not sure if Nintendo published them but one black and white game with chainsaws and red blood stands out, A game called Mad World. It was Platinum who made it but it being on the WII at all set a very different tone for Nintendo consoles going forward. Esspecially as an exclusive.