Funko custom United Underworld
All four members of the United Underground have been customised from other figures. Joker was a shortened and repainted DC Multiverse Joker. Penguin was customized from ReAction Columbia and David Nix figures. Lee Meriwether's Catwoman was adapted from a Funko Julie Newmar Catwoman. Riddler is an adapted and repainted Funko Bookworm.