Has an AFL game ever ended 77-45?
Exactly once. On August 8, 1931, Geelong beat Melbourne 77-45, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 77-45 in league history.
That makes 77-45 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 78-45 has happened 1 times and 77-46 has happened 3 times.