School Alone is an episode of the ALVINNN!!! and The Chipmunks series.
Alvin and Brittany get locked in school together and fear there may be a ghost haunting the school.
Miss Smith asks the class to line up for the founder's day field trip, but shortly after Brittany calls Alvin to the Principal's office. There, Brittany interrogates Alvin, accusing him of drawing unsightly pictures of Miss Smith on chalkboards, for she found Alvin's cap at the scene of the crime. During a call with the Principal, Alvin sneaks past Brittany forcing her to pursue him around the school until she nets and drags him into the classroom. There she hands him a confession to sign though he rips it instead. He attempts to run out the building, but a remote controlled security system stops his escape. While they fight for the remote, it accidentally slips out of their hands and breaks. Stuck in school together, the pair start hearing eerie sounds throughout the hallways. Alvin mentions Cheesy's claim that on Founder's Day every year the founder of the school comes to haunt the school; Brittany refuses to believe it. They both get scared of the dark hallway and try hiding in the classroom. Meanwhile, the janitor is cleaning while listening and singing to music over the PA system. Alvin performs a ritual with no result; they then spot a shadow outside, and Alvin tells Brittany to run while he distracts the ghost. Alvin runs into the janitor's vacuum, learning there's no ghost, before Jimmy the janitor opens the school doors. Brittany thanks Alvin for "saving her life" and decides to clean the chalkboards together. Jimmy disagrees for he drew the drawings of Miss Smith to show his love for her. Alvin and Brittany start arguing about how Brittany blamed him for the drawings. They leave and the ghost of the founder appears briefly, stating "Hmm, my. They'll never get along."
- A sneak-peek was uploaded to Nicktoons UK.
- This episode's title may be a reference to the 1990 film, Home Alone.
- This is the first ALVINNN!!! episode where Simon and Theodore do not make an appearance.
- The Nicktoons UK airing of this episode cuts out the scene where Alvin and Brittany perform a seance.