Has an AFL game ever ended 77-25?
Exactly once. On May 18, 1907, Carlton beat Fitzroy 77-25, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 77-25 in league history.
That makes 77-25 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 78-25 has happened 1 times and 77-26 has happened never.