Oshamask is a Ghost/Water Type Fusemon.
Oshamask is a mixture of Oshawott and Yamask. Oshamask keeps Oshawott's body except it has Yamask's arms and mask instead of Oshawott's scalchop. Oshamask's skin tone is Yamask's shade of grayish black. Oshamask's eyes are the same eyes as Yamask. Oshamask's nose and mouth resembles Oshawott's.