What Makes Them Bad: Run, human!
What Makes Them Cool: Beware. I hunger. Beware! I AM SINISTAR!
You're cruising along in Sinistar, minding your own business, when suddenly a horrible voice interrupts the darkness—"RUN, HUMAN. BEWARE! I AM SINISTAR!" More blood-curdling words have never eked out of our speakers. We won't ruin how completely terrifying this can actually be, so go ahead and open a new tab and procure this game somehow. You've got to see it.