I do like the idea that his family had the foresight to understand the risc of "big brother" in the future to do this.. not to mention their grasp over consepts like "selective breeding" and "biometric impressions".. Not to mention the great mystery how they succeeded with that "no DNA" bit... Yes, he is truly "the one".. the one they call Wally.
When it comes to evolution, a "strong" partner is very relative. I guess his ancestors found each hother very quickly since they were good matches. It is a rare breed after all.