The Bad Case of the Laughs

The Bad Case of the Laughs is the 31st episode of Season 2.

Summary
In Superhero-ology class, Special Agent Oso teaches everyone about nitrous oxide, more commonly known as laughing gas, and it's effects. It can be dangerous if nor neutralized by water quickly. Meanwhile, Sofia's brother and sister, James and Amber, are having trouble with their relationship and they get into an argument, which Sofia isn't happy about. Nothing and nobody seems to cheer her up, not even Kwazii and her animal friends. Kwazii manages to do so, however, helps her find a way to bring James and Amber back together again. During a school production of 'Swan Lake', Chernabog possesses the laughing gas in the Superhero-ology room and uses it to attack Jake, who is doing the music with Sharky and Bones. KC pours water on him, unaware of the cause of his mechanical laughing. Izzy and Cubby run over to him to ask him if he's okay. When Jake tells Peso and Captain Barnacles about his experienc, they realize that Chernabog is behind all of this. The play turns out to be the perfect way to get Sofia's brother and sister back together, so a Kwazii, who is forced to play as Prince Derek, and Sofia, who is playing as the swan, stay behind while Captain Barnacles, Peso, and Jake-who is weakened by the gas again-go to Chernabog's castle to break the spell. Finally, Sofia and Kwazii are attacked during the play. The gang must then save them and break Chernabog's spell before they laugh themselves to death.

Plot
The episode begins at

Trivia

 * This marks as the debut of Chernabog.
 * His second and third appearances will be "The Ruse of Chernabog" and "Darkness Rules All!".

Transcript
Kwazii (Narrating): The Bad Case of the Laughs.