Has an AFL game ever ended 115-99?
Exactly once. On June 9, 1979, Essendon beat Sydney 115-99, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 115-99 in league history.
That makes 115-99 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 116-99 has happened 4 times and 115-100 has happened 2 times.