Jangles the Clown

Jangles the Clown is a the main antagonist in Inside Out.

Inside Out
Jangles is an evil clown who lives in the mind of Riley Andersen. He is imprisoned in Subconscious, the darkest part of her mind. When Joy and Sadness enter that place to find Bing Bong, they find him detained on top of Jangles. After they rescue Bing Bong, they wake up Jangles so he can wake Riley up in order for Joy and Sadness to ride the Train of Thought to get home to Headquarters. They lower Jangles into Dream Productions, where Riley captures his image and wakes. Joy, Sadness and Bing Bong then hop on the Train of Thought and escape Jangles.

During the credits scene, it is revealed that Jangles is based on a real clown and that he secretly hates his job.

Emotions
Jangles' Emotions are seen in the post-credits scene. They are all wearing clown makeup like him. His Joy emotion says, "Six years of drama school, for this?"

Trivia

 * Several Pixar employees confirmed that Jangles is a tribute to Joe Ranft, who occasionally dressed up as a clown.
 * His appearance, as well as his name, is similar to Chuckles the Clown in Toy Story 3.