I was thinking about something similar, but with a different second skil. Long story short, When you hit the opponent with the VG you can pay a cost, retire one of your opponent's unit and the number of critical of the attacking unit gets multiplied by -1. So if you had 2 critical and hit, you remove 2 damages from your opponent's damage zone.
Q: When the VG is attacking, Pellinore is called from deck because of a skill. When Pellinore is moved to (V) because of the skill, what happens of the attack?
A: As the attacking unit is no more, that battle, drive check or hit resolution does not take place. That said, If Pellinore is called with Gancelot Zenith's skill and moved with Pellinore's skill to (V), as it's moving between circles the Power +10000 is not lost.