So I want to try out the classic and all-stars categories but I don't have a Wii U. Can I use the 3ds version instead?

I'm not a mod, but i would probably say no for the Classic because the 3ds and Wii U are completely different from each other, but All-Star would be fine because it's just reverse order.

3ds is not included in this no. 3ds is basically the same thing at smash 4 just like PM is the same at Brawl, so they are not included

Got it. I wont be able to do a run then. Hopefully ill get a wii u sometime

Sorry bud, hopefully you can get a wiiu soon!