Has an AFL game ever ended 36-19?
Exactly once. On May 14, 1904, Carlton beat Sydney 36-19, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 36-19 in league history.
That makes 36-19 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 37-19 has happened never and 36-20 has happened never.