Has an AFL game ever ended 126-57?
Exactly once. On August 7, 1999, Carlton beat Fremantle 126-57, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 126-57 in league history.
That makes 126-57 the 3883rd most common final score out of 6,649 that have ever occurred in AFL. One point away, 127-57 has happened 4 times and 126-58 has happened 1 times.