This story is a sequel to Doctor Whooves and the Auton Invasion of Equestria

Doctor Whooves 1.2
Written as part of my Doctor Whooves series. Can be read on its own, at a pinch.
A story of love, and of friendship. A story of growing up, of growing old. Read it. Read it now. If that hasn't captured your interest, here's a message from the Doctor himself:

"Attention, readers! This is the Doctor speaking. I'm in a spot of bother. Having foiled an invasion attempt by the Autons, I was just trying to relax for the first time in about a century when someting else cropped up. It seems that another pony in this town has been going around for years pretending to be me. I am not best pleased at this. Who he is and why he's doing it I don't know... yet. It looks as though it's down to me to solve this little problem myself. Typical. And to think that the Timelords sent me here to keep me out of trouble. Chance would be a fine thing. All I know so far is that he's friends with the local mailmare, so all I have to do is track her down and talk to her. That should be no problem at all. Although oddly, some of the ponies in this town are remarkably difficult to talk to. Miss Sparkle seems to think it's my fault in some way. How she ever became a princess I'll never know."

Note: as before, this story takes place during the season 5 hiatus.
The Galgonquans, one of my favourite alien races, are taken from Aliens in the Family, a charming book my Margaret Mahy, later adapted into a TV series for the BBC. I have taken shameless liberties with the background of their species. I'm like that.