That Guy. Because then you'd confuse your arch-enemy.
"Dark Blackness, sir! That Guy is here- he plans on thwarting your evil scheme!"
"That guy? What guy? The guy with the briefcase?"
"No, sir! That Guy! Your arch-nemesis!"
"I have a lot of arch-nemeses, I'm a supervillain! Be more specific!"
"That Guy, sir! He does... the thing!"
"The thing? You're not talking about Dish Man, who can keep six dishes spinning on stick at once?"
"No sir! ...though that was pretty impressive, I hope he invades again soon. But that's not-"
This goes on for half an hour, until the bomb you planted destroys the evil lair.