Arnold "Casey" Jones is a character from the Teenage Mutant Ninja Turtles series. Like the turtles, Casey Jones is a self-appointed vigilante. Casey wears a hockey mask and cut-off biking gloves, and carries various weapons in a golf bag over his shoulder, including dual baseball bats, golf clubs, cricket bats, and hockey sticks.
Casey Jones does not appear in the Archie Comics Teenage Mutant Ninja Turtles Adventures.
Casey first appeared in the Raphael solo issue "Me, Myself and I". Raphael runs into Casey beating some muggers and proceeds to stop him before the crooks are murdered. Jones and Raphael fight several times before making peace with each other. In the Mirage series, Casey is extremely violent, even more so than Raphael, but mellows throughout the course of the series. In "Shades of Gray," he accidentally kills a teenager who tried to mug him. The incident sent him into a drunken spiral, damaging his relationship with April O'Neil.
During City at War, Casey leaves town and eventually meets a pregnant woman named Gabrielle with whom he falls in love and marries. Gabrielle dies during childbirth and Casey is left to take care of her daughter, whom he names Shadow. After spreading Gabrielle's ashes, Casey returns to New York with Shadow and repairs his relationship with April. Often Casey has been known to shout the term, "Goongala," as a sort of battle cry.
In volume four he and April are shown married. They raise Shadow as their daughter and try to have a child of their own.
He appeared in five episodes, #41, Casey Jones: Outlaw Hero; #43, Corporate Raiders From Dimension X; #119, Leonardo Cuts Loose; #162, Night of the Rogues; and #177, Cyber-Turtles.
In the newest TMNT cartoon, Jones has a much more important role than in the original show. His father’s shop was burned down by Hun and the Purple Dragons. This gave Casey his hatred for crime. It is revealed in one episode that he and the Turtles had met before when they were kids. The Turtles tried to teach him self-defense to fight some bullies, but it ended badly. In the show, Casey has a good heart, but is easily enraged and often "thick-headed". He loves motorcycles, is good friends with Raphael, and is romantically involved with April. In the Back to the Sewers he decided to get married with April. His main catchphrase is his battle cry “Goongala!”. He speaks in a Brooklyn accent. He is voiced by Marc Thompson in English and Tokuyoshi Kawashima in Japanese.
In the Japanese Version, his voice actors are Hiroya Ishimaru (1st Movie in VHS Version), Taro Arakawa (1st Movie in TV Version) and Issei Futamata (3rd Movie).
Casey appears in the 2007 TMNT film, and is voiced by Chris Evans. By the time the film takes place, Casey is working with April in a shipping company as a delivery man, spending his nights continuing his vigilante activities. Through this, he meets Raphael as the Nightwatcher, becoming his sidekick - though he claims Raphael is the sidekick.
In Teenage Mutant Ninja Turtles: The Manhattan Missions he rescues the Turtles when they lose all their health.
Casey Jones is also in the 2003 game Teenage Mutant Ninja Turtles (Game Boy Advance) and Teenage Mutant Ninja Turtles. He is a boss in Raph's story mode and if the player inserts a cheat code or beats stage 1 as Raphael, he will become a playable character in story mode.
Casey is also an unlockable alternate for Raph in Teenage Mutant Ninja Turtles 2: Battle Nexus.
Casey Jones is also a playable character in Teenage Mutant Ninja Turtles: Mutant Melee.