Scarface

"Me? It was your plan ya goofy clown!"

- Joker controlling Scarface

Gotham's Blackgate Penitentiary once had a Gallows Tree from which 313 criminals with death sentences were hanged. The wood from that tree was whittled by an inmate into the puppet Scarface, and that inmate was murdered by Arnold Wesker, a man who soon fell under Scarface's influence. While most believe that Scarface is simply a tool through which Wesker, as the criminal mastermind, the Ventriloquist, acts out a dark side to his personality, Wesker himself believes that Scarface is possessed by the souls of who died beneath the Gallows Tree, and the puppet actually motivates him to commit the duo's many crimes.

Between Arkham Origins and Assault on Arkham Incident
Before the Assault on Arkham incident, Scarface was carved by an Blackgate inmate. Arnold Wesker began to "hear" the puppet call to him. Scarface "told" Wesker to kill the inmate and take him for himself. Wesker did so and became The Ventriloquist. At some point, Harley Quinn encountered them in prison, finding herself delighted by the actions of the inseparable duo.

Eventually, Wesker was transferred to Arkham Asylum and he took Scarface with him.

Assault on Arkham Incident
When the Suicide Squad break into Arkham Asylum's Storage Facility, Captain Boomerang was startled upon stumbling upon Scarface.

Road to Arkham Incident
When Arkham was reopened Scarface was put in a glass case along with all of the other super villains' personal items.

Arkham Asylum Incident
Scarface appears in a display case in the Warden's office as the answer to the riddle, 'Isn't the Warden too old for a puppet show?' He then appears during the third Scarecrow nightmare as the new Warden of the Asylum, talking on a screen. He does this both in the cutscene and the nightmare itself.

It seems the Joker had managed to get hold of Scarface, as he was talking to himself through Scarface near the end of the game via a fictitious argument while trying to vent frustration on Batman arriving at his location, where he had managed to carve a smile on Scarface's mouth, almost like a Glasgow Smile.

Between Arkham Asylum and Arkham City Incident
After their escape from the Asylum, Joker often played with Scarface, using the doll to insult Harley, which incensed her as she had a prior past with the doll when it was being used by Wesker and Riley.

One of the Joker's henchmen, Mugsy Binks, realized how much his boss enjoyed the doll, so he stole Scarface from the asylum. He made several copies in order to keep his boss's favor. This freed the Joker to mutilate any puppet that failed to amuse him. If he destroyed one in a fit of anger, Joker simply picked up another.

Arkham City Incident
Scarface appears in Arkham City in Penguin's museum in a display case in the trophy room with other thugs and villains.

Post Arkham City Incident
During the events of Harley Quinn's Revenge, Scarface is shown painted up like Joker laying inside a baby carriage.

Arkham Knight Incident
"One ventriloquist's dummy AKA Scarface. This isn't the original Scarface; it's Joker knockoff. No-one knows why, but the clown took a liking to this creepy thing."

- Aaron Cash's audio about the Seized Assests A copy Scarface was kept in the GCPD evidence archive.

Attributes

 * Puppet animated with eerie verisimilitude
 * Frequently wields under-sized but lethal weaponary
 * When teamed with the Ventriloquist, acts as an old-style mob boss, with a sociopathic disregard for human life

Trivia

 * Although Wesker doesn't make an appearance in the game, Scarface makes a cameo appearance in Batman: Arkham Asylum. The dummy is first seen in a glass display case in the old Arkham Mansion, in Quincy Sharp’s Office. Scarface is later, however, glimpsed on monitors and heard speaking during the third run-in Batman has with the Scarecrow in his dream-scape, during which the dummy, manipulated by Joker gives a twisted version of Sharp's welcome speech seen playing in the Intensive Treatment Center. Near the end of the game, Scarface, actually being used by the Joker in a fictional argument, is seen being blamed for Batman's success, despite, as Scarface points out, it being the Joker's plan. Losing his patience, the Joker throws the dummy away, promising to send it back to the Ventriloquist. Wesker's name appears on the party list.
 * Scarface has his own 3D bio despite not being a major or normal character.
 * Scarface makes an appearance at the end of Batman: Arkham VR, occupying Cell #423 at Arkham Asylum. Whenever Batman turns around, Scarface moves to a different position, probably to add eeriness.
 * Scarface's new smile, as given to him by the Joker, could be a reference to the late Heath Ledger's own interpretation of the Joker. Or maybe Joker just wants to see him smile more.
 * In Arkham Asylum, Scarface shares the same voice actor as the Joker. This is most likely because Joker is the only person to be seen holding him in the game.
 * The original Scarface likely ended up in Peyton Riley's possession.