I'm not sure why I asked... and I don't think "peculiar" is the first word I'd use to describe him.
But to answer your question, I don't think berries are ideal for their diets. There are shops in the market district that cater to domestic animals like them - you'll be able to find food and grooming items for them there, among other essentials. As for medical care, a "veterinarian" should serve as the equivalent to a Pokemon Center nurse, but keep in mind that none of their services are free of charge.
no subject
But to answer your question, I don't think berries are ideal for their diets. There are shops in the market district that cater to domestic animals like them - you'll be able to find food and grooming items for them there, among other essentials. As for medical care, a "veterinarian" should serve as the equivalent to a Pokemon Center nurse, but keep in mind that none of their services are free of charge.