Has an AFL game ever ended 98-34?
Exactly once. On August 17, 2014, GWS beat Melbourne 98-34, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 98-34 in league history.
That makes 98-34 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 99-34 has happened 3 times and 98-35 has happened never.