Not sure if anyone is still here to answer this but I'm trying to finish all the Challenges, and the most annoying one is the 10 Hours/50 Hours of Smash playtime. It was REALLY DUMB that it's restricted to only Smash mode and not Smash Run out Classic (I find Smash Run more fun and its easier to find Custom Equipment as opposed to regular Smash where it's super rare)
Is there anyone whose completed all the challengers know of a way to speed up the process? Does Online play count?
The 50 doesn't mean just Smash I'm pretty sure. The 10 might just be Smash only.