MalRyumon is quite the polar opposite of its relative, SantoRyumon. It supports a more westernized dragon look, walking about on four legs and having a set of leathery wings. It still wears the tattered and frayed robe it wore as a Yamimon, only now the colors have changed. Instead of being purple sleeves and a crimson torso, the sleeves are crimson with purple twisting patterns (like smoke), and the torso is black with twisting crimson patterns (again, like smoke). Its scales are a deep onyx color, and its eyes are an acidic green, with yellow irises and black slit-pupils. It still wears the skeletal mask, only now the snout has elongated to accommodate its own larger muzzle, but it only covers the top half of its head.
- Skull Buster - Charges at an opponent with its head and rams them
- Viral Flame - Engulfs the foe in black fire that corrupts any data that isn't vaccinated
- Byte Basher - Hits the opponent with claws charged with darkness to try to disrupt their data
- "Mal" is French, and it means "evil" or just plain "bad"
- "Ryu" is Japanese, meaning "dragon"