Has an AFL game ever ended 42-42?
Exactly once. On July 30, 1910, Richmond and Geelong drew 42-42, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 42-42 in league history.
That makes 42-42 the 3884th most common final score out of 6,649 that have ever occurred in AFL. One point away, 43-42 has happened 3 times and 42-43 has happened never.