Has an AFL game ever ended 115-56?
Exactly once. On August 4, 1945, Melbourne beat Geelong 115-56, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 115-56 in league history.
That makes 115-56 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 116-56 has happened 2 times and 115-57 has happened 3 times.