Ah, the alias, that good old super-villain standby. What a relief it must be to sign into a motel under an assumed name and sleep soundly, content in the knowledge that Aquaman, for instance, is looking for someone else entirely. It's too bad that so many villains are so terrible at thinking them up. I mean, the names that most of them were born with are often bad enough - E. Nigma, I'm looking at you - but give a super-villain half an hour to think up a fake name and he'll produce something so obvious that I simply despair. I'd honestly be surprised if there wasn't a guest book somewhere with 'I. M. Captainboomerang' written in it. And the worst, the absolute worst of the lot is the Joker, the man responsible for H.A. Laughlin, L. Afterman, Joseph Kerr and so forth. That's right: Joe friggin' Kerr.
But possibly the worst of all showed up in Detective Comics No. 45, as shown in this dramatization of my internal monologue as I read this issue:
The guys in the super-keen car are in the employ of an old fellow named A. Rekoj, who just sent them out to rip off a diamond shipment. Batman showed up and there was a scrap, but the real bummer was when the freakin' Joker stole the loot! I mean, it's crazy! How did he know about the robbery?
Man, Rekoj is steamed about the whole Joker thing. I bet Rekoj and Joker are enemies from now on. Fifty years from now, people will still be talking about the Rekoj/Joker feud.
Wait a second! Hold the phone! Rekoj is the Joker! He's played us all for chumps! And he's executed his plan flawlessly! Batman's never going to figure this one out!
Holy crap! Batman figured it out! He figured out that Rekoj = Joker! How'd he do that! He just straight up earned the 'world's greatest detective' thing! Woo!
The really sad thing is that Batman figured it out by listening in on the Joker as he talked to himself. More like 'world's greatest dorktective', man.