Piisuke

As a rare Futabasaurus, this prehistoric creature holds a special place in the series as Nobita's very first and only dinosaur companion. Making notable appearances in both the long-form narratives of volume 1 and the short stories within volume 10, this character serves as a unique, fleeting part of the protagonist's adventures. Though its time in the spotlight is limited, its presence marks a significant milestone in the early history of the saga.