Ungyou can be found in San fantasico, Trash and boxes which is available after Update 3.0.
Ungyou, like Agyou, is based on the two Nio protectors of Buddha found at temple gates in Japan. Both Nio are the same manifestations of a deity known as Shukongoshin. Ungyo is always depicted with a shut mouth (said to represent death) and an open palm. He radiates strength.