Twilight finds a keyboard named Berney locked away deep in the Castle of the Two Sisters. But Berney has some weeeeird powers. On Twilight's rise to power, her and Berney become great friends. But then tragedy strikes.

Rainbow Dash joins Lightning Fast, a rogue conduit, to help him find his daughter in the fluffy city of Cloudsdale

This is my first fic, so please excuse me for any mistakes.
Although constructive criticism is always welcome!

To clear up any confusion, 'crossover' tag is used for elements and references to the inFAMOUS universe