Two times the action, ten times the mayhem, and a billion chances for alien madness! Heatblast and Grey Matter lead the charge in two intergalactic stories from Cartoon's Network's Ben 10 .Which alien's skills pass the ultimate fiery Heatblast or brianiac Grey Matter? Follow along in two super-special adventures as ten-year-old Ben takes each alien out for a spin. Worlds are threatened, villains are vanquished, and Ben only bungles up a handful of times!