Part of the Wibblyverse Continuity.
Part ten of Doctor Whooves: Friendship is Wibbly Series 1
Previous Story: Vacation to a Pleasant Country Retreat
Next Story: Fall of Empire

Scootaloo can't fly, and she needs to know why. A confrontation with her aunts and an accident with the TARDIS sends her back to ancient Pegasopolis, in the years leading up to the unification of the tribes. However, if a fiendish plot succeeds, that event may never come to pass. An old school foe of the Doctor is on the scene, and her latest experiment may spell doom for Equestria as we know it.

Violence tag for robot soldiers, potential futures coming back to ensure their existence, and mentions of war.
Gore tag for accidental vivisection/dissection depending on how you look at it.
Death tag for implied or offscreen demises.
Also features brief mentions of racism, ableism, and homophobia, as well as infidelity, biomechanical fusions, and gratuitous flashbacks.