My Little Timelord is a fanfiction by Victorian Hellsly [1] featuring Derpy "Ditzy Doo" Hooves and Doctor Whooves. This is the first work featuring Derpy as The Doctor's companion. It was published on February 2nd, 2011.[2]
Summary[]
Derpy starts to head to work, when she bumps into Pinkie Pie and Rainbow Dash. They talk about The Doctor for a bit, then a spaceship shows up. Out come a bunch of "metal wastebaskets" that shout "EX-TER-MIN-ATE!" This is only the beginning of the dalek/cyberman invasion.