Has a FIBA World Cup game ever ended 116-78?
Exactly once. On November 25, 2017, Cameroon beat Guinea 116-78, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 116-78 in league history.
That makes 116-78 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 117-78 has happened never and 116-79 has happened never.