Fan Casting “Jack’s Associates” in The Grim Adventures Of Billy And Mandy

As it Turns out, Jack was just an associate of Aku, and others, who are part of a new, reformed version of the Syndicate. Aside from Aku, this also includes Plankton, Vlad Plasmius, Professor Calamitous, Oogie Boogie, King Koopa, Gaston, Mr Mxyzsptlk, Azula, Charles Burns, The Red Guy, The Headless Horseman, Team Rocket, Zurg, Shere Khan, Syndrome, Rasputin, The Terrible Trio, Don Lino, Stinky Pete, Dr. Facilier, and Frollo