User blog comment:GamingDylan/New Smash Info In Japanese Demos/@comment-31587332-20140906091942/@comment-860254-20140907025043

I guess I could buy that Lucina's not playable in the demo, but I don't think the demo would have these alternate costumes. Mainly because they'd be single player, so they'd probably only have the single player Classic and, maybe Smash Run?