3DBB's body elongates and his face stretches vertically. After this transformation happens, the user blacks out and wakes up back in snowdin. 3DBB's name in this phase is "BONEWALKER". His name's a reference to the mythical creature, "Skinwalkers", who steals a person's skin and uses it in some way. However, due to his eye shape, transformation and mouth shape, also reference the infamous mandela catalogue Alternates who do a similar thing to Skinwalkers.