Challenge accepted - New Super Luigi U review
The inaccurately named "New" series of Super Mario Bros. games aren't exactly known for their innovation or challenge. They're solidly built games in their own right, but they haven't really pushed the platforming envelope.
A perfect challenge for people who think that Mario games have been a bit too easy lately; This isn't the safe, sterile world typically found in the "New" Super Mario series, Over 80 levels that will challenge and confound, all offered at a nice price ($19.99 for DLC available now on the eShop,...
…but he's only available in the DLC levels; It would have been awesome to be able to use him in the main game as well, This is not for the faint of heart - do not buy if you don't like absurd difficulty