Ma Mushroom is a citizen of Bumblyburg in the 2D Animated Show as well as the 3D Classic Films.
Ma Mushroom, as well as her family, were seen leaving the movie theater in the beginning of the film. Later, they were with the angry mob that was convinced by the Rumor Weed that Alfred was a robot.
Ma Mushroom's most prominent role was in this series. She wears what appears to be a bonnet on her head, which covers her mushroom top.
She is an inventor, and was upset (angry) when Larry the Janitor broke her machine. She was the first citizen inflicted by the Angry Eyebrows.