Robotized Masters

From what I gathered, 9 of Sonics friends get turned into the Robotized Masters. We know in the first issue, that happens to Tails, Amy, Knuckles, and Shadow. Issue #2, Espio, Charmy, Vector, and Silver on their way to getting the same process. But sometime before issue #5, Tails gets turned back to normal, and in issue #6, Sonic, Tails, Mega Man and Rush face the 8 Robotized Masters. So the question remains....who is the last Robotized Master?