Sonic Prime, Nine's Lives

Nine's Lives: Sonic must rally the Shatter Friends. (S1, ep 20)

Home Sick Home: The epic battle continues. Grim Big proves a devastating weapon and Sonic finds himself on the ropes until he receives help from Shadow! (S1, ep 21)

The Devil is in the Tails: Sonic confronts Nine atop the Citadel. (S1, ep 22)

From The Top: Nine finally sees the error of his ways, but it's too late for an easy clean up. Saving the Shatterverse now will require an unthinkable sacrifice, but Sonic is determined. (S1, ep 23)