Has an AFL game ever ended 85-6?
Exactly once. On July 8, 1899, Essendon beat St Kilda 85-6, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 85-6 in league history.
That makes 85-6 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 86-6 has happened never and 85-7 has happened never.