Alvin Ackerman feels left out when snowboarding champion Max Asher stays with his family during training season.
Max and Shred fall for the same girl, so they decide to take her on a date; Abby is on a mission to get Quinn to join the school soccer team.
Alvin and Max grow tired of being roommates; Abby and Howie help Lloyd write a novel.
Alvin and his family are charmed by Max's snowboarding nemesis, Yuud Nuuderuud, and refuse to believe it when Max claims Yuud is a cheater.
A giant snow storm traps the Ackermans inside their house; Max has a panic attack and the family takes unusual steps to help him through it.
Alvin's nemesis, Wendy Chong, sabotages his invention; Max tries to make it up to him by sneaking them into a party.
Abby accidentally auctions off Max's lucky snowboard, and he is convinced that he can no longer win.
Alvin faes a dilemna when he decides to get a sponsor; Howie makes a special snowboarding suit for Max.
Alvin and Max have to care for a baby-simulator doll to pass Life Skills, but they accidentally destroy the doll.
While ice fishing, Alvin and Max are trapped in the hut; Diane and Abby try to calm Howie after she sees a scary movie.
Max opens a box and reveals a secret Alvin's kept since Abby's ninth birthday; the boys try to make up six years of birthdays for Abby.
Max gets a job at the Yogurt Yeti in order to help Alvin with a contest
Alvin and Wendy form a truce to compete together in the State Academic Bowl; Abby hopes that Derek will ask her to prom.
Alvin and Abby live in each other's lives for a bet; Lloyd tries to clean a pool that has been neglected for years.
Alvin and Abby get help from a TV series to help save the Yogurt Yeti; Howie is put in charge of Max's fan site.
Max employs Abby to ghostwrite his autobiography. Howie's horoscope stops her from helping Alvin.
Max and Shred are left in charge of the Junior Porcupines and are each determined to take the scouts on the best camping trip ever. Abby gets an unusual job at the Yogurt Yeti.
Shred takes things too far after he discovers the joy of playing pranks; Diane tries to get a possum out of the house; Lloyd tries being the 'bad cop' parent.
Max and the gang's trip to Switzerland for a major race gets foiled when Yud Nuuderuud blackmails them; Howie builds a home security system for Lloyd.
When Max becomes homesick, Alvin, Howie and Abby try to cheer him up by throwing him the best birthday party ever.
Howie enlists Alvin as her assistant for a youth science fair competition; Max and Abby must put a stop to Diane and Lloyd's table tennis addiction.
Alvin goes to extreme measures to hide his allergies when Max's dog shows up in Blizzard Springs; Abby turns to Kaylee for help after failing at her first attempt at improvisation.
The family is surprised when Alvin suddenly has a girlfriend, but quickly grow fond of her. Max however smells a rat and stands up for his best bud when he thinks this new love is just using Alvin for student government gain. Howie is testing the intelligence of a pig, but runs into trouble when the Ackermans keep treating it like a pet.
After Alvin claims not to have any fears, Max, Howie and Juliet set out to scare him. But with Diane and Abby away at a college interview, Lloyd is left in charge and does not know how to handle a potential ghost in the house.
Alvin and Juliet have been dating for a while and Juliet wants their parents to meet. But what seems like a harmless idea quickly escalates into the parents forbidding Alvin and Juliet from seeing each other anymore! At the same time, Max and Abby discover Howie has been keeping an amazing snow fort secret from them.
Alvin forgets an important anniversary with Juliet, then makes things worse when he tries to follow the not-so-sage love advice of everyone in the family. But eventually, with Abby's help, Alvin finds the confidence he needs to win back Juliet back. Meanwhile, Max meets his second biggest fan, Harley, and Howie's not happy about it.