Extreme Metal Batman.
I'm trying to get on this guys label. He rocks ass.
I was once in a band called ÐEÄTH MËTHØD under the stage name 'Count Bastard'. The other band members all had stupid stage names as well, but I've forgotten them. We were kind of parodying another Island band, OverLord, whose members all had/have awesome stage names such as 'Baron Darren', 'Mike the Elephant Boy', 'Lazlo the Lacerator' and so forth.
Way better than ridiculous stage names is ridiculous band positions, which is something OverLord also did brilliantly. They're currently mainly tied up in a sort of supergroup called Syrafex, whose current roster is:
Darren The Baron- Cunt Wrenching Vocal Swarm.
Mike In Wonderland- Life Claiming Fuzz Drenched Horned Gtr.
Bex From The Fex- Funeral Wreckage Rhythms.
Lawerence of Alabia- Low-End Frequencies of the Russian Mafia.
Nick's Bleak Vision- Lung Muscle Miscarriage.
The ultimate masters of such silliness were always Cradle of Filth though. It is worth buying their discography just to read the backs of their lyrics booklets. They're full of not only brilliant camp excess as far as crediting people ("Also embroiled in this, the final victory of the ravens over the angels...") but also invariably include random phrases like "CRADLE OF FILTH PLAY METAL FORGED FROM THE HOT FRICTION OF WANKING NUNS EXCLUSIVELY".
I still can't belive so many of both their detractors and fans take them seriously.