K-9, is Commander X-2's dog. This character's animated debut was in 'Haredevil Dare', a short that came out in 1948.
His vocal effects are provided by Frank Welker.
In the series, K-9 is the main focus of the episodes 'K-9 Kaddy' and 'K-9 Quarry'. In both those episodes, he tries his best to protect the Commander X-2 from threats he is oblivious to. Most specifically, in K-9 Kaddy, he tries to protect the entire planet from The Gophers, who ridiculizes him but who he wins against anyway by accident. In K-9 Quarry, he specifically tries to save his owner. In both scenarios, the Commander becomes exasperated with K-9's behaviour which he fails to identify as being to protect him.
Appearance[]
K-9's appearance is fairly similar as it was from the other medias he appeared in, even the first short he was in.
However the noticeable differences are a smaller skirt (or pteruges) and the fur of the crest on the helmet was yellow.
His attire is similar to the one of the Commander, with the crested helmet, the skirt and white sneakers.