Has an AFL game ever ended 187-52?
Exactly once. On May 12, 2013, Adelaide beat GWS 187-52, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 187-52 in league history.
That makes 187-52 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 188-52 has happened never and 187-53 has happened never.