Yuna, Stewie and Brian is the seventh episode of the eighth season of Yuna's Princess Adventure.
Princess Yuna, Brian and Stewie Griffin found themselves stuck inside the old cavern. So, They had to wait until help comes.
One special day/Yuna tells her story
At Hogwarts Castle, Princess Yuna, Brian and Stewie started digging through abandoned tunnels and discovered and old Cavern. Suddenly, There was a huge Earthquake and the entrance was blocked and Stewie accidentally soiled himself. Yuna, Brian and Stewie despaired if they were going to get out of the cavern at all. Then, Yuna changed Stewie as she tells a story about how Draco shared his heart with Dobby after their rescue.
Back at Hogwarts Castle/Brian tells his story
Back at the castle, Titanic was getting worried about Yuna, Brian and Stewie. Hugo and Rita came and inform that help is on it's way. Back in the cavern, Yuna, Brian and Stewie were waiting patiently for help. Brian tells a story about his and Vinny's puppyhood.
Tigatron and Airazor arrived/Stewie tells his story
Back in the castle, Tigatron and Airazor came just in time for a search party for Yuna, Brian and Stewie. Isamu kept crying for his big sister. Moon Starlight decided to cheer him up by showing him some of her old baby toys. Meanwhile, in the caverns, Stewie told his story about how he got back in time to prevent Brian from his death.
Searching for Yuna, Brian and Stewie/Good memories
Meanwhile, Tigatron and Airazor are picking up scanners during their search for Yuna, Brian and Stewie. In the caverns, Yuna can remember the good old days of how she and her friends became heroes and heroines.
Saved by the Maximals/The latest discovery of Equestria
Just then, Tigatron and Airazor busted an opening for Yuna, Brian and Stewie and bring them to saftey. Later, back at the castle, Yuna, Brian and Stewie were rewarded for the latest discovery in Hogwarts Castle.
- This episode is based off one of the Family Guy episodes, "Brian and Stewie".