Despite the fact that the machine was untested, Rex wanted to use the device to regain his memories. However, instead of returning his memories, it almost made him go full EVO Six was able to save him, but the feedback from the machine caused Six to lose the past six years of his memories.
Later, Six attempted to use the device to get his old memories back, but was almost killed. Rex destroyed the machine in the process in order to prevent it from further harming Six.
- 218. "Six Minus Six"