Episode 76. According to the query, Pinkie Pie and Cheese Sandwich are in episode 76 of "My Little Pony", which tells the story of a party planner holding a birthday party for Rainbow Dash and giving the bone to Pinkie Pie. "My Little Pony" is written by The American toy manufacturer Hasbro began broadcasting the cartoon series on the Discovery Family TV channel in the United States on October 10, 2010.