Robins (Earth -22)

The Robins of Earth -22 are four feral, cannibalistic children who were created by the Batman who Laughs to serve as his pets.

Origins
The Robins were originally normal children, kidnapped by the Joker and exposed to a Joker Venom strain which drove them as insane as the Joker. After Batman saved the children, he snapped and murdered the Joker resulting in him being exposed to the same strain. To try and save the children, he wound them up and kept them together in quarantine.

After being driven to murderous madness, Batman took at-least some of the children and had them become his new Bat-Family due to his own massacre of the real Bat-Family. He would typically be seen with three of four of them, whom he ground the teeth of to sharp points. In addition, he would torture the children into obeying him and acting like feral dogs. He's even get them to only say, "Crow" with them only heeling if he says, "Bar" as a sick reference to the death of Jason Todd.

Batman would go on to torture and reprogram his own son Damian Wayne into becoming his specialized Robin, using him on special occasions.