Guest Stars Diedrich Bader voices Batman / Bruce Wayne Briana Cuoco voices Batgirl / Barbara Gordon Sanaa Lathan voices Catwoman Harvey Guillén voices Nightwing / Dick Grayson Phil LaMarr voices Samson Alan Tudyk voices Ocean Master Gary Anthony Williams voices Brother Prince Shark Griffin Newman voices Mad Hatter Larissa Gallagher voices Prawn Uncredited Tisha Campbell voices Tawny Young