To be fair, I only said I believe he may have a mental disorder.
She shows all the signs of being either Autistic, like myself but not nearly as well adjusted or pleasant, since he takes relatively unimportant issues and flips out over them as if they were life or death and seems to have an obsession with it (many with autism have obsessions, such as mine being video games), or he is a sociopath for the first reason listed along with his inability to empathize with others since he either can not or refuses to put himself into others shoes to try and understand how they feel and thinks others should just 'accept' his opinion while saying he accepts theirs, which he clearly does not.
He also said he 'knows' that all males who like Rosalina (or most of the other female characters) only like them for perverted reasons yet says its 'okay' if I like her 'if (I'm) really a girl', which is, quite frankly, extremely sexist (he also insulted my brother and friend when I said they like her, saying they just don't admit it and then somehow thinking such an implication wasn't insulting).
I also found out he doesn't like Peach or just about any of the female characters, likely for similar reasons, along with Sonic (whom he called Modern 'Hentai-quilled' Sonic) and just about any 'Japanese' characters (he said the 'best' versions of Mario & Sonic were the American Comic ones, which were both based on the old cartoons, so I suspect he just doesn't care for Japanese stuff in general).
I tried to have a civil conversation with him to help him to understand why people hate him and to get him to be more accepting of even things he loathes but was offended I told him to get over unimportant things and, essentially, suck it up along with believing that he can not be acting immature just because he feels he's intelligent, though I did inform him that Intelligence and Maturity are not connected and that even the most intelligent of people could act like an immature child.
To be quite honest, he reminds me of Chris-chan, the creator of Sonichu, and anyone here who knows who that is likely knows exactly what I mean..