I don't own a Wii U. I also don't own a copy of Super Mario Maker. I wish I owned them, though, because if I did, I'd be all over both when the Ice Climbers costume showcased in the following video is added to the latter.
That's supposed to happen later this week in Japan, by the way. Most folks think it won't be long until it's made available to Super Mario Maker players in other regions, too.
In the meantime, you could do worse than spend some time reading up on the Famicom (or NES, if that's more your kind of thing) game that inspired this drool-worthy bit of DLC. Here's my rather pithy review of Ice Climber, for instance, and here are a couple of photos of (as well as a few thoughts on) that same title's gorgeous Japanese packaging.
If you're still begging for more, check out these write-ups about the Famicom Disk System version of Ice Climber: 'For the sixth game of Christmas, the UPS man brought to me...' and 'Reason #401 I could be considered an eccentric (aka bat-sh*t crazy) gamer'
See also: 'I think I've changed my mind about Ice Climber'