[Jeffro283]

Arbok @ Choice Band
Jolly 252 Speed 252 Attack 4 HP
Intimidate
_Ice Fang
_Thunder Fang/Earthquake
_Poison Jab/Gunk Shot
_Crunch

Sweeper Set. Covers his weaknesses, and has a good stab move as well. Thunder Fang is for the abundance of flying/water crap Pokemon in the lower tiers, but Fire Fang is also an option to cover Bugs and UU/NU Grass Pokemon. Earthquake is definatly an option over Thunder Fang as well.

Arbok @ Choice Band
Jolly 252 Speed 252 Attack 4 HP
Intimidate
_Poison Jab/Gunk Shot
_Pursuit
_Earthquake
_Fire Fang/Thunder Fang

Very similar to the first set, but utilizes EQ and Pursuit is used to make it a chaser. Gives slower Psychics some worries. Rock Slide is an option, but EQ is better (typically).

Arbok @ Leftovers
Bold 252 HP 252 Sdef 4 attack
_Haze
_Poison Jab/Gunk Shot
_EQ
_Glare

Hazer...Glare is added for status support.

Keep in mind that with ANY of these sets, taking Glare as a move over something is a viable option (although your held item will have to change). In such case, you can take all the speed EVs and throw them into HP (if you would like).

Except of course, for the Choice Sets...

When reviewing Arbok, I looked at these as options...Fire Fang, Ice Fang, Thunder Fang, Crunch, Gunk Shot, Rock Slide, Poison Jab, Iron Tail, EQ, Return, and Pursuit for physical...Toxic and Haze for support, along with Rest and Sleep Talk...Mud Bomb, HP, Sludge Bomb, and Dark Pulse as special options.

That being said, Arbok makes a good Hazer, and a decent attacker, but can't do much else.