Has a FIBA World Cup game ever ended 96-88?
Exactly once. On August 9, 1990, Argentina beat Canada 96-88, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 96-88 in league history.
That makes 96-88 the 240th most common final score out of 863 that have ever occurred in FIBA World Cup. One point away, 97-88 has happened 2 times and 96-89 has happened 1 times.