Single celled organims with chloroplasts would fall under the Protista Kingdom. The Protista Kingdom is used to classify organisms that do not fall into the animal, plant, of fungi categories. read more
There are three types of protists: plant-like protists, animal-like protists, and fungus-like protists. There are definitely some single celled organisms that have chloroplasts, but they do not have rigid cell walls. However, your questions asks what are single celled ANIMALS have chloroplasts. read more
SINGLE-CELLED ORGANISMS. Many life forms consist of a single cell. As well as simple bacteria, there are more complex organisms, known as protoctists. Unlike bacteria, they have complex internal structures, such as nuclei containing organized strands of genetic material called chromosomes. read more