Has an AFL game ever ended 99-78?
Yes. AFL has seen a final score of 99-78 4 times. It first happened on July 21, 1934, when Richmond beat North Melbourne, and most recently on August 15, 2010, when Hawthorn beat Melbourne.
That makes 99-78 the 947th most common final score out of 6,607 that have ever occurred in AFL. One point away, 100-78 has happened 4 times and 99-79 has happened 1 times. At one point the score disappeared for 41 years, between 1969 and 2010.