Has an AFL game ever ended 76-33?
Exactly once. On July 13, 1912, Carlton beat Essendon 76-33, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 76-33 in league history.
That makes 76-33 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 77-33 has happened 3 times and 76-34 has happened never.