Pull what: Anything that increases the drag will increase VMC-putting flap down always increases drag so it will always increase VMC
Well then how do you explain why Vmc in the Twin Otter, for example, is Flaps 10, 64 KIAS and Vyse is Flaps 10, 80 KIAS (reduced 4 KIAS/1000#)?
Obviously, drag has increased with flaps 10, but generally stating that a drag increase will increase Vmc maybe isn't totally accurate. I know that in a four-engine jet manuevering speed is much higher with flaps up. Of course, rudder travel is generally limited at higher airspeeds, so there is obviously a balance between flap position, rudder travel and Vmc for those aircraft. In the large aircraft I have flown, Vmc is always lower with flaps in the takeoff position, which could be as much as 50% flaps in one particular type.