Doyakentchi looks like a brown dog with darker ears resembling Doyatchi's hair. He also has similar eyes and the same mouth as Doyatchi.
On Virtual Pets
Tamagotchi Meets + On
Doyakentchi is a pet available on the Magic, Fairy, Pastel, Fantasy, and Sweets versions. They can be lured to the house by leaving either the Scooter or Magic Set outside, though a couple other toys from the Tamagotchi On App have attracted him. Unlike other incarnations, pure Doyakentchi are white instead of brown, and are allegedly different.
In the Anime
Tamagotchi! Yume Kira Dream
His name comes from Doya (どや) which is from the name of Doyatchi. The second part of his name may come from yaken (やけん) or kenshu (けんしゅ). Yaken actually means a dog with no owner, but kenshu can mean any type of purebred dog.