Has a FIBA World Cup game ever ended 96-56?
Exactly once. On November 24, 2017, Tunisia beat Guinea 96-56, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 96-56 in league history.
That makes 96-56 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 97-56 has happened 2 times and 96-57 has happened never.