A running joke throughout the series is when something (like a bomb) is thrown off camera and an explosion or a crash is heard, followed by a voice yelling "My car!". In the episode The Return of the Revenge of Dr. Blowhole (2011), the shout is in Japanese (with subtitles).
The license plate on the penguins' car says 'I love Bonjovi' which they got in New Jersey where the band originate from.
According to Tom McGrath, the TV series takes place in a separate or alternate continuity from the movies, making this show non-canon.
Private appears to speak in a middle-class British accent, as opposed to the other penguins (the exception here is Rico, who hardly talks and mainly communicates in grunts) and most of the Zoo animals, who speak with American accents.
Instead of being voiced by studio members at DreamWorks Animation like in the films and video games, all the penguins in this series except for Skipper were all voiced by professional voice actors.