A long time ago...
There was meeting of two princesses of two worlds
(This world exists as alternative to the world "Equestria girl")
(Apply different styles for different worlds ponies)
Share knowledge about their own worlds
"Normal" world: Magic: all as we know
This world. Unicorns can use magic according to their "element"
Physiological differences in the wings. Use the magic of pegasus < sizes wings
The problem with magic of this world. Telekinesis rare. Cutie mark determines the nature of magic each unicorn
Earth ponies ... unchanged
Knowledge exchange.....
Way of getting to the "normal" world
Finally ... the elements of harmony in the "normal" world can defeat anyone enemy!
Thinking Celestia: "I can not rely only on myself. I need have good protection"
*Assistant offers different variation of the army*
The invention of armor
Pegasus: mobile, have weapons and strength
Earth ponies: very strong, fast, for some time invisible
Unicorns: clever. Develop and improve the armor for its own elements
Progress: "normal" world > this world
Invented extraction of magical energy. Each energy-consuming device draws energy from the environment. Distribute this energy in large city centers
Princess Luna. Her magic power increases due accumulated discontent
Celestia is trying teach her magic. But it is useless. Sunset Shimmer doesn't have the same element
Luna couldn't find her through dreams
Sunset identified its own element - demonic
She learned about portals in the other worlds from the diary of Celestia
Became student of another Celestia
And she was interested the elements of harmony
It's not telekinesis. Her element is gems
Rarity creates "dress for one day". Price of gems: the "normal" world << this world
Celestia wanted search ponies with talents. And call them "Harmony"
Fluttershy childhood spent with the animals. And he opened the talent sneak in mind
But the princess is too strong for her
Rainbow Dash became the best pegasus in the army
Pinkie Pie always was late...
At night Luna is getting stronger
Battle in the city would entail sacrifices
Evacuation of the city to spread panic
Gather ponies in one place and protect while all others will be coping with the problem