"Pixie King" is the 16th episode of Season 4.
While the duo, as pixies, strive to earn their wings, Ren wants to be "King of the Pixies".
- Wilbur Cobb (again voiced by Jack Carter) makes an appearance as a pixie.
- This is the last episode where Ren's insane laugher is heard.
- This episode was rated 18+ in Canada.