Yellow Devil is a recurring antagonist from the Megaman series. It was created as one of Dr. Wily's more prized creations in his conquest for world domination. Due to its potential in combat it became the basis for later generations of "Devil" models.

It's stature is large and composed of yellow gelatinous liquid controlled by its robotic eye, able to mold together and solidify or scatter and attack individually. It's common form when solid appears as a rounded body with shoulders, arms and legs all completely yellow with the eye of it being black with a reddish yellow pupil.

Among its abilities is being able to attack with countless gelatinous blobs when separated or attacking with its limbs and energy based attacks from its eye while solid.