My nephew the brony

Issue 1- I believe the term is "Wal-martians".

Issue 2- (placing my man card on the table) I did catch an "MLP" episode a few months ago.
It delt with an alternate universe where one of the "pony" characters was living as a human, and there was conflict between "good and evil" and between loyalty to different groups of friends.

I must say, the writing was fairly good, and way above average for a "kid's show".