Hi guys i just build this deck for fun and wanted to share it with you. Hope it works.

Chars:

1s':

2x Mr. Myx
4x Mad Hatter

2s':
4x Dead Shot

3s':
3x Catman
3x Parademon

4s':
4x Ragdoll

5s':
3x Cheshire

6s':
3x Scandal

7s':
4x Lex Luthor

Plots:

4x Mobilize
4x Dodge The Bullet
3x Revitalize
4x Help Wanted
4x It's Not Over Yet
4x Straight To The Grave
2x Secret Six Victorious

Locs:

2x House Of Secrets
2x Slaughter Swamp
2x Leslie Tompkins's Clinic

what are your thoughts. With a proper hand it is posible to play the six needed chars in round four keep em and win fitht turn.

the best one i have ever seen was made by Tim Bartow and it teamed up underworld and it was great

you wouldn't happen to know the deck would ? I am just curious because I have all of these secret six victorius' and I figure I could put them to some use.

2 The Dwarf – Soul Broker
4 Deadshot – Dead Aim
4 Black Rose – Roxanne Simpson
4 Umar – Sorceress Sublime
4 Parademon - Apokoliptian Ally
4 Catman – Thomas Blake
4 Ragdoll - Resilient Rogue
1 Cheshire - Jade
4 Scandal – Savage Spawn
4 Lex Luthor @ Mockingbird – Evil Exile

4 Enemy of my Enemy
4 Death's Embrace
4 Straight to the Grave
4 In Limbo
4 Netherworld Gift
2 Ritual Sacrifice
2 Secret Six Victorious
2 Slaughter Swamp

Batow gave a pretty good writeup about how to play the deck too:
http://www.vsrealms.com/forum/showthread.php?t=50105

You might also want to read this. It will shed a little light in a otherwise gloomy dark team:

http://my.tcgplayer.com/blog/view/id_194/

I know the deck from tim batow but it is kinda old because it doesnt play the mad hatter. i mean it is good no doubt but i want to keep the deck mono because it is pretty good and i think that underworld doesnt provide that much help. i mean ok more recoursion tech but i can do that without black rose and dimensional rift too. and if i need more tutoring i add more mr. myx and play enemys in addition.

Its your choice when I played Secret 666 it always went off by turn 6

How could I add Mad Hatter to this deck?

Assuming you mean to Secret 666, maybe cut 2 Catman and 1 Ragdoll for 3 mad hatters? (maybe cut cheshire if you want to run 4 of him and think you can win on 5 with it), but I don't often know what I'm talking about.