User blog comment:SalaComMander/DEATHBATTLE: Dr. Eggman vs Dr. Wily/@comment-4580205-20111230190829/@comment-115265-20111231142208

It could be argued that Wily won because of his *ahem* bright idea to use Roboenza on Metal...

Because of the technicalities catering to both of them, both were nixed in favor of Metal Sonic alone.