Scarecrow

The scariest of all scariness, it the Scarecrow!

Real Name: Jonathan Crane

Arkham Origins: ---

Arkham Asylum: The Scarecrow is one off the main villians in the game, you chase him untill you reach the sewer, where Scarecrow threatens to fill the sewers with fear toxin. But then, Killer Croc pops out and tries eating The Scarecrow, Batman throws a Batarang at Killer Croc's shock collar, Killer Croc jumps back in the water, bringing Scarecrow down with him.

Arkham City: Scarecrow does not appear in the game, but you will find:

Scarecrow's mask on a batch of hay.

A boat filled with bugs and a "Test Subject" who is suffering

and, 3 secret codes.

Arkham Knight: Scarecrow will be the main villian aside the Arkham Knight.