Heterodontosurus would make a good pet according to the document. It is small, plant-eating, and harmless. It has green and yellow spots and small arms and legs. As a pet, it could be easily walked and trained. It eats plants and leaves that are inexpensive to provide. Its natural habitat of bushy forests is similar to what is found in residential areas. In conclusion, the document argues that Heterodontosurus' small size, plant-eating diet, and ability to be trained make it a suitable pet.