Merrymaker

Dr. Meredith aka The Merrymaker, was a former psychiatrist at Arkham Asylum and later opened a pratice for the Joker obssessed. He currently ran the League of Smiles until Batman put a end to his gang.

History
Dr. Meredith was a former psychiatrist at Arkham Asylum. He is infamous for his violent ways of treating his patients. While most doctors feared the madness of The Joker he and Dr. Harleen Quinzel (otherwise known as Harley Quinn) were the only ones willing to take on the Clown Prince of Crime. While Harleen later went mad with The Joker and became his girlfriend and sidekick; Dr. Meredith opened private pratice for the Joker obssessed.

Soon he convinced to all of his patients that it would make the Joker proud to cause chaos while he secretly was using them as a diverson so he could kill his ex-wife. Dressing as the Merrymaker he became the leader of the gang known as the League of Smiles. When Batman found out about the gang he soon located the location of the Merrymaker. When fighting the Merrymaker, the three main members of the League found of what he was using them they ganged up to beat him.

Later when brought to custody he was deemed insane by the interviewer. He was last seen being taken away to Arkham with the rest of the crazies.

Powers and Abilities
He has no powers. Abilities of his include psychology.

In other media
Since the character has just recently debuted he has not yet been seen in any other Batman media.