Kidsongs Oxnard's baby sister episode.

When Calina brings Oxnard's border collie baby sister, Crystal, to the studio and she asked him to babysit her, Oxnard gets worried about having his little sister around. But the kids and Hamtaro help him learn to be a big brother for his puppy sister. Meanwhile, the kids learn about all humans, animals, and Pokemon are babies. For question time, Nurse Joy brings Mew, a rare Pokemon (who is a baby), to the studio.