Has an AFL game ever ended 99-99?
Exactly once. On May 14, 1977, Essendon and Richmond drew 99-99, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 99-99 in league history.
That makes 99-99 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 100-99 has happened 5 times and 99-100 has happened never.