Today, Sonic Team released the second episode of the Sonic x Shadow: Generations: Dark Beginnings prologue animation, following Shadow the Hedgehog as he dives into his tragic past to confront the origins of his haunting nightmares of conflict and loss. In Episode 2, Shadow’s search for answers brings him into the crossfire with his allies and Dr. Eggman, making him question if his quest for closure is worth the risks that accompany it. The third and final episode of Sonic x Shadow Generations: Dark Beginnings airs on 10th October.
Source: SEGA
Thanks to Greatsong1 for sending us the news tip!

Thanks for posting this, now look forward to the 3rd and final episode on October 10th.
As a graphic designer, I really love the animation and the fight scenes they did in the short.