Boris is a spy for the fictional nation of Pottsylvania, and takes orders from the nation's leader, Fearless Leader (and occasionally the rarely seen Mr. Big). Boris's missions range from trying to steal a secret rocket fuel formula to eliminating all television from the United States as part of Pottsylvania's various attempts to seize power. Boris, who is thoroughly dedicated to (and takes delight in) all manners of nefarious deeds, would also sometimes engage in his own schemes, such as starting his own organized crime gang. Separately from the television series, a commercial for the Rocky and Bullwinkle Show featuring Boris established that he was an active member of Local 12 of the Villains, Thieves, and Scoundrels Union. During this commercial, Boris also claims to be "the world's greatest no-goodnik." Boris is also quite proud of the fact that the nicest thing Fearless Leader ever did for him was sending a picture of himself to Boris inscribed "Drop Dead — Fearless Leader". Boris would often outsmart Bullwinkle in the Mr. Know It All cartoons.
Boris appears in the 2014 Rocky and Bullwinkle short.
In this incarnation, he is sent by Fearless Leader to control a female moose robot and use it to kill Bullwinkle. Like always, he easily fools Bullwinkle and on their dates, Boris tries his best to get rid of Bullwinkle but keeps failing with Bullwinkle's stupidity and all.
Bullwinkle and "Boris" (well the robot anyway) are to be married on a cruise line and Rocky decides to stop the wedding. Meanwhile, Boris has plans to destroy Bullwinkle right after the two are hitched. Soon, Rocky tries to stop the wedding, but it is too late: Bullwinkle's been married.
While dancing at the afterparty, Bullwinkle unknowingly makes Boris fall out of the robot's butt. Rocky finds out and tries to warn Bullwinkle, but is stopped by Natasha. Meanwhile, Boris is getting nausea in the suit with Bullwinkle's carless dancing. He decides to set the robot to self destruct and eject himself from the
Boris is a very evil, sadistic, and sneaky Russian man. He is also very incompetant and often tries to scam, torture, or harm Rocky and Bullwinkle in any ways. While he usually loses, he always gets the best of Bullwinkle in the Mr. Know It All segments.
Boris is a tiny white Russian man. He wears a black outfit and has a tiny mustache. In the 2014 short, he wears a tuxedo and is a normal skin color.