Board Thread:Monster Discussions/@comment-26942270-20160219134015/@comment-25285745-20160220053422

I'd say the Meganulons are incredibly vicious and violent, but they lack the intelligence to be good or evil. Megaguirus on the other hand is evil to an extent, as she has an endless power lust and displays a pretty vicious and taunting fighting style against Godzilla, as if she's showing off, and it ultimately is her downfall because Godzilla doesn't mess around.

Destoroyah isn't a predator, he's a killer. Very little can threaten Destoroyah, but he attacks everything he sees. It's not to feed or simply defend itself, it's out of a desire to kill. Destoroyah is a nihilistic creature that sees its only purpose as killing and destroying. If Destoroyah encounters anything, whether it is hostile or threatening to him or not, he attacks and kills it. Destoroyah demonstrates the fact he knows what he's doing. The M.U.T.O.s were just trying to mate and survive and really paid no regard to human beings, only killing them as a result of their size and territoriality. Destoroyah actively seeks humans out and kills them even though they alone pose no threat to him. Destoroyah doesn't seem to want to defend any territory, instead he seeks out new lifeforms and areas just to destroy them. Destoroyah had no reason to attack Junior except the fact that he saw him and decided to attack. When Junior beat him, Destoroyah wanted revenge and sought him out and killed him with his now-superior power.

The difference between Destoroyah and, say the 2014 Godzilla, is his intentions. Legendary Godzilla knew that the M.U.T.O.s would kill him if they reproduced, and most likely lost many of his own kind to them. When he knew they were going to reproduce, he sought them out and tried to exterminate them at all costs. Godzilla only wanted to stop them, he desired no hostility towards anything else. He actively avoided causing unnecessary violence and destruction, and killed the M.U.T.O.s as efficiently as he could. Destoroyah sought out his enemies and victims simply because they were alive. He destroyed everything he could and was fully aware of the death and destruction he caused.

And if you watch the movie, when Destoroyah drags Godzilla across the Haneda Airport tarmac, he roars in a way that (coupled with the way his roar already sounds) sounds like laughter. It was probably intentional, since he never roars in that exact way again, and in Godzilla: Save the Earth his victory animation includes an obvious evil laugh.