Has an AFL game ever ended 25-23?
Exactly once. On July 20, 1907, Fitzroy beat St Kilda 25-23, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 25-23 in league history.
That makes 25-23 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 26-23 has happened never and 25-24 has happened never.