One time Prussia and Austria had a drunk girly sleepover in which Prussia made Austria watch the German dub of MLP. Prussia's favorite pony is obviously Rainbow Dash, and unsurprisingly Austria decided she liked Rarity. Austria also commented that German!Scootaloo sounds a lot like Prussia used to when she was a little kid.

Needless to say, Teuton was not amused when her big self tried to get her to watch an episode.

(Obviously this is all based on Friendship is Magic, because MLP was not a high priority on the list of 'things you missed on the other side of the wall')