This week's character is The Radiskull. He will kill you all, one by one.
Radiskull is a hugely oversized floating skull with a purple mohawk and a bandanna. Besides Homestar Runner, he's my favorite flash cartoon character of all time. What does he do? Besides scaring the crap out of people and drinking coffee, he raps. I have all his music sitting in my mp3 player.
I really wish Joe Sparks had brought things further and released more episodes of Radiskull and Devil Doll, but alas, it was not to be. As of right now, his site hasn't been updated in six years.
EDIT: I thought the videos were no longer available on the site, but PMD just threw links in the comments, so I'll paste them in here for your convenience.
NOW IT'S TIME TO KICK IT!!!
Episode 1: "I am the Radiskull..."
http://www.joesparks.com/radiskull/episodes/e01/playback.htm
Episode 2: "Hella Weenie"
http://www.joesparks.com/radiskull/episodes/e02/playback.htm
Episode 3: "Radiskull Hate Snow!"
http://www.joesparks.com/radiskull/episodes/e03/playback.htm
Episode 4: "Love 'N' Stuff!"
http://www.joesparks.com/radiskull/episodes/e04/playback.htm
Episode 5: "Angel, This is Wrong!"
http://www.joesparks.com/radiskull/episodes/e05/playback.htm
Episode 6: "Wicked Nikki!"
http://www.joesparks.com/radiskull/episodes/e06/playback.htm
Episode 7: "Radiskull's Cave"
http://www.joesparks.com/radiskull/episodes/e07/playback.htm
Episode 8: "Candy In Hell"
http://www.joesparks.com/radiskull/episodes/e08/playback.htm