Pokecaust Go!

A group of identical young boys in red and white uniforms and caps, each holding a Poké Ball and a device, are shown in a dimly lit wooden structure, their expressions shifting from excited to maniacal as they cheer and hold up their items. The scene cuts to a yellow mouse-like creature and a blue turtle-like creature looking distressed, then returns to the boys, who now have glowing devices and are laughing wildly, with one boy's shirt briefly glowing white.