Actually, quite a few elite Olympic lifters could squat 4x bw. I even heard of a 100kg guy squatting 400kg.
Its not that hard to believe when guys like Naim could clean and jerk 190kgs in the 60kg weight class. These guys squat 3x bodyweight like its childs play.
That being said, Pyrros wasnt even the strongest lifter in the comps he was in. He often won when he had no business winning. But his performance is consistent under pressure. I guess you can say that he was born to be a champ.