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When school is closed because of snow, Marty Onster and his best friend Sally Weet go sledding until Bart Ully and his pals build a dangerous jump at the bottom

When Valentine's Day comes round, Marty Onster wants to let his best friend Sally Weet know how much he likes her, even if Bart Ully's behavior brings out the m

Marty Onster is excited to work with clay in his art class, but when Bary Ully ruins his sculpture, Marty turns into an angry monster boy.

Marty Onster wants to be his favorite superhero, Mega Boy, for Halloween, even though his parents want him to be a really good monster, but when Bart Ully revea

Marty Onster attends Scary Scout camp even though he has trouble being a monster, but when he overhears Burt Ully making fun of him to the scouts of Super Scout