In Kingdom Hearts, the word DARKNESS is uttered way too much. One character in the game uses the word DARKNESS very commonly, in pretty much everything he says. This is why many people believed that CATS would be able to defeat the master of DARKNESS, even though he is a Square character.
The word DARKNESS usually makes an appearance when someone is talking about Kingdom Hearts.
In one version of the Kingdom Hearts drinking game, you take a shot every time that the word DARKNESS is uttered. Don't use hard liquor or you will die of alcohol poisoning.