Has an AFL game ever ended 99-47?
Exactly once. On August 21, 1915, Richmond beat Essendon 99-47, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 99-47 in league history.
That makes 99-47 the 3884th most common final score out of 6,649 that have ever occurred in AFL. One point away, 100-47 has happened 3 times and 99-48 has happened 2 times.