This article is of a Yo-kai which only appears in that game and may or may not appear in future titles.
Yo-kai Medallium biography
"Dandory was transformed into Death Mercury's servant by his demonic power. He gained the power of water, but due to an unexpected event, all his plans have been ruined."
Dandory Mercury is a dark teal Yo-kai that has light blue-gray skin with various dark blue stripes. His hair is a dull teal color, with bright blue tips and stripes, similar to the fur pattern of a tiger. His eyes have black sclera, teal irises, and black pupils. His paws and tail are bright teal in color as well, and he has a light blue volt-circle as his tail tip. He is wearing a dull blue short kimono with a lighter blue collar and skirt hem. He has a golden necklace with the symbol for Mercury and a looser thick necklace below it. He has a light blue, thin belt with a silver buckle of the Mercury symbol on its side. Under the kimono is a black high necked top and over is a black jacket with blue stripes down it, a royal blue hem along the front and a feathered collar in purple, black and white. He has black trousers that match his jacket with the blue stripes and black boots with royal blue soles. In one hand, he is holding a black book with gold embellishments and a like teal Mercury symbol on the front with a blue eye in the circular section.
Dandory Mercury appeared in the "Ginga Watch ~Death Mercury Edition~" Event that lasted from May 17, 2024, to May 31, 2024. There was a chance of befriending him in the limited Ginga Watch Gasha. He gives a defense and damage bonus in the Death Mercury impossible stage located in the Seaside Cave (Japanese: 海辺の洞穴,Umibe no horaana) map.