It got heroes from DotA...
Also: Yahtzee, Doraleous, Tuxedo Mask, the whale shark from Street Sharks, Jack(webcomic), Buwaro(webcomic), Shiro Tagachi, that clip from Microsoft Word, Preston Marlow, Keith Kaiser, the lich lord, Mhenlo, a hive tyrant, Putt Putt, Octillery, Gold(pokemon), Hamlet, and Johnny Bravo.
However, he didn't get: Sartek(Warlords Battlecry), Sirian(same game), Jangutz Khan(that's pretty much cheating it's so obscure), Drip, and motherfucking Charles Doolittle Walcott. That last one's the only one that irritates me.
Seeing this, I can probably make a guide for defeating him with famous people. Just put in famous scientists and people who the majority of the internet wouldn't know.