S.T.A.R. Labs intern, Valerie Perez, and their relationship quickly blossomed into a full-blown romance. Once accepting the mantle of the Flash, Bart moved to Los Angeles, California and enrolled in the Police Academy. Robin asked him to join the Titans but Bart declined, saying he'd rather work towards membership in the Justice League of America. Shortly after resuming the mantle, Iris Allen warned Bart that if he fought the newly formed league of Rogues, he would not survive. Inertia, in a plan to steal the speed force energy for himself, manipulated the Rogues into battle with Bart. As a depowered Bart fought valiantly against the combined might of the Rogues, he saw the spectre of the Black Flash, and died as Iris Allen and Valerie Perez were left to mourn him. Later on New Earth, during the Final Crisis story line, Superman was called to the thirty-first century to assist the Legion of Super-Heroes in fending off Superboy-Prime, who was thrown to the future in the aftermath of the destruction of Earth-51 and the Sinestro Corps War. Prime, raging about his minor place in history as a Superman rival, released the entire Legion of Super-Villains from the prison planet Takron-Galtos and waged war on Earth and the Legion. In response to this, Brainiac 5 summoned the Legions of Three Worlds (alternate earths) to combat Prime's forces. Revealing that the Legion had captured "living lightning" in the Legion's last trip to present Earth in The Lightning Saga, Brainiac 5 had Legionnaire XS run on the cosmic treadmill while the three Lightning Lads activated the "lightning rod" to release the living lightning. Although he tried to stop them, Superboy-Prime was unable to stop the lightning from being unleashed. A fully formed alive-and-well Bart Allen, in his Kid Flash uniform, appeared before him. When the New 52 universe began, the Kid Flash working with the Titans was known as Bart Allen. He ended up with a different backstory, and eventually was written out of the storyline. He was later replaced as Kid Flash by Wally's cousin, Wallace West. Wallace West Wallace West is the third Kid Flash of the main DC Comics Universe. He first appeared in The Flash (Vol. 4) Annual #3. He is the son of the fifth Reverse Flash, Daniel West, and cousin of the first Kid Flash and third Flash, Wally West. Originally intended as a reinterpretation of Wally