The Flash

The Flash(Barry Allen) is a superhero and member of the Justice League in Teen Titans Go!. He first appeared in "The Return of Slade" as a statuette in Alfred's Toy Cave, before reappearing in "Some of Their Parts" alongside his fellow Justice League members. He is also mentioned in the episode "Two Parter," and his costume is worn by Starfire. Later on, he is seen briefly in a tank, which Darkseid held him captive.

Biography
"Barry Allen is The Flash, the fastest man alive. Using his super-speed powers, he taps into the Speed Force and becomes a costumed crime-fighter. His position is a legacy in the Flash Family, successor to the original Jay Garrick and predecessor to Wally West. He is a founding member of the Justice League of America."

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Physical Appearance
Flash has a characteristic red garment, and with a mask covering the face belonging to. Located in the middle of the shirt is clearly visible, bright Lightning Symbol. The dress' elbow-part of is also a Lightning Symbol network processes over.

Season 2

 * The Return of Slade (cameo)
 * Some of Their Parts (cameo)

Season 3

 * Two Parter (cameo, Starfire's costume)
 * Wally T (cameo)