General Skarr

General Reginald Peter Skarr is one of the main characters from the animated series,, and a recurring character in it's sister show,. On "Evil Con Carne", he is an angry, depressed army general, who works at Evil Con Carne, for his boss, Hector Con Carne, who he not-so-secretly "hates with every fiber of his being" and wishes to overthrow as leader and possibly even destroy. In "Billy and Mandy", he is a gardener, who lives next door to Billy. He is constantly being tortured and annoyed to death by Billy, mostly, but not entirely because he keeps destroying his garden. He's appeared in the Christmas Specials from both of his shows.

Evil Con Carne

 * "Christmas Con Carne"

The Grim Adventures of Billy & Mandy

 * "Billy & Mandy Save Christmas"