Which Pixar film features the imaginary friend Bing Bong?

The Pixar film featuring the imaginary friend Bing Bong is Inside Out. He is a pink, elephant-like character who lives among Riley Andersen's long-term memories and helps Joy and Sadness navigate her mind.

Bing Bong was created as Riley's childhood companion, blending several animals and producing candy from his tear ducts. He knows the inner workings of Riley's imagination, including the Train of Thought, and initially helps Joy and Sadness find their way back to Headquarters after they become separated from the other emotions.

His most important scene comes in the Memory Dump, where he and Joy try to escape using his song-powered wagon. The wagon cannot rise while carrying both of them, so Bing Bong jumps out, allowing Joy to reach safety. His sacrifice symbolizes how childhood memories and imaginary friends gradually fade as children grow older.

Bing Bong is voiced by Richard Kind. The character was kept largely out of the film's marketing so audiences could discover him during the story. Soul, Toy Story 3, and Up feature different imaginary, emotional, or fantasy elements, but none contains Bing Bong.