Has an AFL game ever ended 82-15?
Exactly once. On July 3, 1909, Melbourne beat Richmond 82-15, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 82-15 in league history.
That makes 82-15 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 83-15 has happened never and 82-16 has happened never.