Kick's middle name is a reference to his old name on Kid Knievel, Francis Little.
When he was a baby, Kick had blue eyes, but when he grew up, the blue part of the eyes disappeared, and they became completely black (same with Gunther). This may just be the style of the cartoon, considering many characters are shown to lack a visible eye color.
Kick appeared as a watch in MAD episode "Are you Karate Kidding Me?" animatic.
Kick's real name is probably a pun or reference to Clancy Brown (a voice actor who voices Gunther's father, Magnus Magnuson) since Brown's name is short for Clarence.
Kick gets his daredevil personality from his mom and grandfather's side of the family.
Oddly though, it is shown in "Exposed" that Kick only has one helmet but in some episodes like "Garage Banned" it is shown that there are some extra helmets which he sometimes uses for his test dummies.
Kick's birthday is February 22 according to the show's Facebook page and to Sandro Corsaro's Twitter feed because that is the day that he first drew Kick.
Again, according to the creator's Twitter feed, Kick may have no hair.
According to Sandro's Twitter feed again, Kick's real age is 10.
It is possible that Kick has a secret crush on Kendall Perkins because in his dream in "Rocked" Kendall appears as a very attractive woman.
According to Sandro's Facebook page, Kick is the youngest person in his class and grade.
Apparently when the Kick Buttowski series was in the Kid Kneivel stage of development. Kick was suppose to have a second friend; a girl named Sam who supported Kick's stunts but was dropped and possibly replaced by Kendall or Jackie or Scarlett.