Mr. Stuffy is a stuffed toy that was seen in Pearl's dream in the episode "Sleepy Time."
Mr. Stuffy is a dark green stuffed bunny. He has tall ears, a pink nose, a light blue stomach, and light blue buttons for eyes.
Mr. Stuffy is only seen in the episode "Sleepy Time." He does not speak, even though Pearl asks him to confirm that boys do not understand the importance of tea parties in her dream, despite being a male himself (as his name infers, or Pearl just does not think that other males would understand).
He might have made an appearance in the episode "Skill Crane," inside the Skill Crane. However, this has not been fully confirmed.