Spoilers because this question discusses the new final boss in Super Smash Bros. WiiU / 3DS.
After defeating the Master Core, it turns into an object that looks like a smash ball that you hit repeatedly until you knock it off the stage. It doesn't seem like the boss attacks you at all during this stage. If you take too long to finish the boss at this point, can anything bad happen? Or could I, for example, leave the game running for half an hour at this point and then finish it without any penalty?