Dash traveled through time with a time ship finding Tempest, Dash discovered that Tempest turned Princess Celestia on stone so she decided to intervene. Dash and tempest start a battle, Tempest tried to transform Dash into stone but she repelled the attacks with her metal wing, however Shadow Tempest was very powerful using her strength to corner Dash, seeing that the Six Mane decided to help her by achieving that Tempest backed down and between all managed to scare away Tempest … for the moment …
 
Alternate Dash: I see that you have certain problems in your time.
 
Twilight and the other Manes wondered who she was and where she had come from, Dash told them that she came from an alternate timeline.
 
The Mane were amazed, mainly Rainbow Dash.
 
Twilight asked:
 
Are you coming for us to help you?
 
Dashie replied: I come to destroy Starlight Glimmer…
 
The Six Mane would be frightened at that moment while Dash kept explaining
 
Dash: Where I come from, we are fighting against a very powerful enemy who calls himself the King Sombra, day after day we fought for our freedom but little by little we lost valuable elements of our army while he became more powerful. In one of those battles protecting a small filly I was badly hurt, I lost one of my wings, but luckily a pony that looks just like you (points to Twilight), designed a wing prototype so I could keep fighting.
 
One day Princess Celestia received news of a mare named AppleJack revealing that a traveling pony had arrived in our time, this pony talked about meeting us and informed us about a certain Starlight Glimmer that was the cause of having unleashed a chaos in our reality. That’s how Princess Celestia sent me in the middle of a war we were losing to the past with the goal of eliminating Starlight Glimmer.
 
Twilight: I think I’m that traveling pony that was your time, Oh Celestia! That means that the time lines to which I travel are alternate realities to these, these are not different times!
 
Alternate Dash: What do you mean?
 
Twilight: I can tell you that Starlight Glimmer is no longer the villain you think, she is now a good pony.
 
Alternate Dash: My duty is to destroy Starlight Glimmer
 
Twilight: Even if that happens, your reality will not change, you haven’t even traveled to the past, this is the future but of an alternate reality!
 
Alternate Dash: That can not be … that means there was a fault in the journey, oh no! is it all lost?
 
Twilight: No, there is still hope for your world, we just have to find a way to reach your reality, we will help you defeat the King Shadow, but first we must take care of Shadow Tempest, possibly after this our destiny changes our lives.  

 
Well, in my reality and in my free time I do crazy things like this XD
 
I hope you enjoy it