Pumbaa Jr. is a male alligator. He is the adoptive son of Pumbaa, and the adoptive nephew of Timon.
When Pumbaa Jr.'s egg rolled underneath Pumbaa and hatched, Pumbaa believed that he was the alligator's mother. He quickly bonded with the youngster and named him "Pumbaa Jr." As Pumbaa Jr. aged, he became increasingly annoying to his adoptive uncle, Timon, who eventually told Pumbaa that the alligator was not his real son. This caused a heartbroken Pumbaa Jr. to run away from home. However, he soon found a female alligator, with whom he became mates, and Timon and Pumbaa helped the couple find a new home in a chicken pen.