Teacup Shunsuke, also known as the internet celebrity Shunsuke, is actually an English Pomeranian. Due to a special cosmetic trim, Shunsuke's hair is cut very short, almost close to the skin, giving him a cute and toy-like look. But it should be noted that teacup dog is not a standard dog breed name, but more of a common name for extremely small dogs.

As for what Shunsuke looks like when he grows up, we can refer to the adult characteristics of the British Pomeranian. Pomeranians grow up to be petite, usually weighing about 3 to 4 kilograms and about 38 centimeters in length. Their eyes are large and lively, their ears are small and upright, and their hair is thick, usually white or other light tones. Overall, Pomeranians have a sweet, lovable feel to them.