Robin's family moved to the Smith's former house.
The moral of this episode is that even if your friends aren't always available, if they're real friends, they're still dedicated to your friendship.
This is the first time Princess Morbucks appears in a 20 minute episode.
Despite have being produced by Cartoon Network Studios instead of Hanna-Barbera, it shows the latter's logo at the end.
This is one of the many episodes were the Powerpuff's bedsheets are mixed. Blossom is on the Bubbles' side, Buttercup in the middle, and Bubbles being on the Buttercup's side.