Scarecrow is one of the major characters from the Oz lore including The Wizard of Oz film, and Return to Oz. He often appears in James Rolfes' non-canon flash animated short, Wizard of Oz 3: Dorothy goes to Hell.
In his appearance in Wizard of Oz 3, he's almost in a bad mood and doesn't feel like going on adventures or helping out. He considers suicide due to the fact that he lacks any intelligence and was not important by his friends. While he is going to K-Mart to buy a gun, he was hit by a bottle from a Teenage Mutant Ninja Turtles: The Secret of the Ooze tree which caused him to transformed into his 1939 self. He arrives at K-Mart and commits suicide in front of a cashier. After he was thrown into the garbage by an employee during the apocalypse, Scarecrow was taken away by the time wrap. Because of the alternate timeline where he, the Tin Man and the Cowardly Lion never met the wizard, they never received a heart, brain, and courage.