2. Alpha, Bravo, Unicorn

The trio return to the dragon world which finds itself under attack by winged unicorns which threaten to destroy Wingfire Academy. However before the team can fight them, they must get Blaze, who has fallen into a slump from a previous defeat by the unicorns, back on his feet to help them.

3. A Game of Cat and Mouse

The trio is transported onto a space ship whose human occupants are set to arrive on a new planet to colonize. However, Penn finds himself in the form of a mouse and must save the ship from a feline Rippen who seeks to plunge it into a black hole.

4. Wings of Destiny

The trio find themselves in a fairy world in the midst of a wrestling tournament which Penn and Sashi must win to keep the forest out of evil hands. However, things are complicated by an argument between the two, forcing Boone to try to get them to mend their friendship.

5. Sensitivity Training

Sashi is called in for sensitivity training which Principal Larry forces Penn and Boone to attend as well. The methods seem to work to quell her anger, but soon become a hindrance when the trio return to the underwater world for a mission.

6. The Bewildering Bout of the Astounding Automatons

Boone and Sashi have to build a Penn robot to save a world from the forces of evil.

7. Back to the Past of Future Balls

Team Zero return to the Ball World to save its past from Rippen.

8. A Tale of Two Wizards

A return to the Knight World causes issues for Boone when he meets a better wizard than himself.

9. Rockullan, Papyron, Scissorian

In a world that is a Rock, Paper and Scissor version of Game of Thrones, Penn's team face a siege by the Scissorian army.

10. Be My Ghost

Penn's team has to save a ghost from supernatural exterminators Rippen and Larry.

11. The Chinchilla

Penn has to take care of The Chinchilla -- which causes problem on their return to Plush Toy World.

12. The Kobayashis

When Sashi's parents find out about her real job with Penn and Boone, Penn has Phyllis zap her and her parents into the Outer Space World.

13. Cereal Fugitives

A mission in Cereal Mascot World gets weird when the Milkman makes an appearance.

14. The Last Mountain Beast

Penn's emotions cause problems for the latest mission.

15. Ninki Ninja Fight Town

Penn, Boone, and Sashi visit an anime dimension to compete against Rippen in a ninjutsu tournament to bring back an island back with the help of 3 new friends.

16. My Mischievous Son

Penn has to stop Rippen from ruining a dinner in a sitcom dimension.

17. That Purple Guy

Penn, Sashi, and Boone must make the Princess Argelbleccht and Grinkon fall in love.

18. Rootilda

Boone is kidnapped and Penn and Sashi must solve the mystery and find him.

19. The Most Dangerous World Imaginable

Vonnie must rescue Brock from the belly of a giant chicken.

20. Trading Faces

Penn, Boone and Sashi must stop Rippen from ruining Middleburg High when he switches bodies with Larry.

21. 13 Big Problems

Boone gets a bad report card from Phyllis, making his parents mad. He tries to fix this while on a mission in the Giant Monster World.

22. Mr. Rippen

Rippen's origin story is revealed for his first day as a part-time villain.

23. At the End of the Worlds

Penn, Sashi, and Boone must travel to the three most dangerous places in the multiverse in order to free Penn's parents as Rippen plans to conquer the Most Dangerous World Imaginable with Larry and those with him after having to close its portal from the other side.