On ignorance.

Luta: He is, in fact, both.
But he's also incredibly hax and the only way to beat him is to genderbend him into a girl and ignore him.
Jarnakel: Lies. I just ignore him. No genderbending required. But then, I'm SRS Jarn.
Luta: Well I mean if you meet him in a combat situation...
...which is kind of a stupid thing for you to do.
MadMustache: Who'd just stand there ignoring someone in combat? Jarn does!