The Batman 2004 Flash [top] -

The action sequences involving Mirror Master’s dimensions allowed the animators to play with forced perspective, shifting physics, and kaleidoscopic visuals, making it one of the most visually distinct episodes of the entire five-season run. Legacy and Impact

In his standalone spotlight episode (Season 4, Episode 8), Barry returns to Gotham to hunt a metahuman thief (Gearhead) who can match his speed. This episode deepens his character: we see his frustration, his dedication to justice, and his willingness to sacrifice his speed to save innocents. Batman, impressed, officially designates him a reserve member of "The Batman Team" (a precursor to the JL). the batman 2004 flash