Where to Find the Light: A Shadouge Story

In a timeline where Generations is for Sonic's 20th birthday, Shadow remains bitter over having to say farewell to Maria again. In the months following, the Ultimate Life-Form goes on a mission to find the power of the Time Eater to see them again. Rouge the Bat, knowing Shadow was hurting after the events of Generations, worriedly searches for him.

(My wife and I collaborated on this after the Shadouge moments in Shadow Generations; we both met over shipping Shadouge. )