Leo and Satan is an animated comedy created by Newgrounds user Oney (Chris O'Neill), featuring the exploits of Leo, a preteen boy with a trapdoor to hell in his bedroom, and Satan, who's exactly who you'd expect him to be, although for the dark lord, he's pretty chipper and childish (but also quite bipolar). The unlikely duo's first appearance, "Leo and Satan — Pancake Doomsday", is a simple introduction to Leo's love of pancakes and Satan's love of sugar. Nothing special. "Leo and Satan - Battery Catastrophe" has the duo trying to find the batteries for their game controller.