On the distant planet Koris, Vixy, a fierce cheetah warrior, is fleeing from the invading forces of Black Doom. During a desperate confrontation, Black Doom reveals she shares a dark connection with Shadow, sparking tension before she activates an ancient teleportation shrine to escape. Vixy crash-lands on Earth in Station Square, where she’s quickly confronted by local police—but Sonic arrives just in time to protect her. She explains her dire situation, warning that Black Doom is coming. Meanwhile, high above Earth on the ARK, Shadow and Rouge sense the rising Chaos energy linked to Vixy’s arrival. They decide to return to Earth to confront the growing threat. Back at the Thorndyke Mansion, as the group absorbs Vixy’s story, Shadow and Rouge arrive. In a rare show of emotion, Shadow silently hugs Vixy, shocking everyone and deepening the mystery of their shared past. Together, they prepare to face Black Doom’s impending assault.

(Sonic prime aftermath) One day at green hills sonic is sitting on the edge of the huge mountain thinking about everything he went through to get back green hill and his friends, but suddenly a portal opens in the sky

Sonic 4: sonic the hedgehog is at home with Tom and tails and knuckles and they r all having dinner (chilli dogs) and Maddie comes in with an announcement!

Sonic, tails and knuckles have all got captured by eggman and he is keeping them in glass cages and u ( a human girl) takes care of them and secretly wants to free them but can’t because u work for eggman under ur will)