He is stated to have kept surrounded only by hurt and abused Pokemon. His room is full of toys that have been damaged by things like claws, suggesting the Pokemon he was with had a bit of a violent temper. The fact that he lived his entire life isolated from the real world is itself a form of abuse.
When Plasma's plan is done with, Ghetsis furiously insults N, calling him a freak, taunting him over his inability to understand humans (a result of his isolation), and proceeds to battle you using a team that seems tailored to defeat N's. The fact that he has Kyurem attack you in BW2 shows his regard for human life, and has certain implications for what would happen when N's usefulness is gone.
"Murder of the living is tragic, but murder of the idea is unforgivable." - Janus, speaker of the synod
Screw the games. My dream about Pokemon last night is the most dark.
An antagonist kidnapping Gym Leaders by trapping them in badges, doing the same to Ash's Pikachu, then killing it before he catches up with the villain. Then Ash trying to kill the antagonist with his bare hands, and nearly succeeding, then I woke up.
I once dreamt I killed Giovanni
"Official Toy Scraggy of the Pokemon Rumble U board" 3DS code: 1118-1052-2607 (PM me if you add me)