Hamster Number 2 was a small purple hamster owned by the Enriched Learning Center for Gifted Children, that appeared in Bart the Genius. Cecile Shapiro was fond of it and conducted an experiment with it and Hamster Number 1, in which Number 1 was infected with the straphococcoli virus and Number 2 acted as the control hamster. Bart Simpson was also fond of him, but Ms. Mellon dismissed it as they planned to dissect it the following week. But Bart accidentally blew the school apart and it, along with Hamster Number 1, escaped.