Has an AFL game ever ended 93-18?
Exactly once. On August 22, 1931, Melbourne beat Hawthorn 93-18, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 93-18 in league history.
That makes 93-18 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 94-18 has happened never and 93-19 has happened never.