Has a FIBA World Cup game ever ended 85-54?
Exactly once. On August 29, 2002, Spain beat Canada 85-54, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 85-54 in league history.
That makes 85-54 the 240th most common final score out of 863 that have ever occurred in FIBA World Cup. One point away, 86-54 has happened never and 85-55 has happened never.