Why doesn't it? It's round, slow, steel, and a lot more ball-like than the likes of Steelix and Bronzong, who learn it. It would make it so much more useable. Anyway, RMT.
Team at a glance;
Infernape @ Choice Scarf
Nature: Rash
Ability: Blaze
EV's: 252Sp.Atk, 232Spe, 24Atk
~ Overheat
~ Hidden Power [Electric]
~ Grass Knot
~ Close Combat
This has always worked better for me than the standard Mixape. EV's make sure it beats Adamant ScarfChomp. Hp Electric for Gyarados.
Gyarados @ Leftovers
Nature: Impish
Ability: Intimidate
EV's: 212Hp, 176Def, 122Sp.Def
~ Taunt
~ Thunder Wave
~ Waterfall
~ Avalanche
Just awesome. T-Wave to slow stuff down for Maggy.
Mismagius @ Leftovers
Nature: Timid
Ability: Levitate
EV's: 236Spe, 166Sp.Atk, 108Hp
~ Substitute
~ Shadow Ball
~ Hidden Power Fighting
~ Calm Mind
Gotta love it :) One of the few special sweepers that will actually beat Blissey. EV's beat +Spe Garchomp by one point, taking into account the 30 IV in speed required for Hp Fighting. 108 Hp is nice for Leftovers, with the rest in Sp.Atk.
Considering Taunt over Sub, as I hate being phazed.
Leafeon @ Leftovers
Nature: Relaxed
Ability: Leaf Guard
EV's: 252Hp, 176Def, 82Sp.Def
~ Wish
~ Protect
~ Leaf Blade
~ Baton Pass
Beats T-Bolt Boah, Gyarados, Swampert if they lack Ice Beam, and quite a lot of other stuff too. Also chucks Wishes around, which is always useful.
Drapion @ Leftovers
Nature: Impish
Ability: Sniper
EV's: 252Hp, 252Def, 6Hp
~ Knock Off
~ Whirlwind
~ Night Slash
~ Brick Break
Gets rid of Toxic Spikes, knocks stuff off, and rapes stuff with Night Slash's high crit rate and Sniper. BB for coverage.
Registeel @ Leftovers
Nature: Careful
Ability: Clear Body
EV's: 252Hp, 160Sp.Def, 98Def
~ Rest
~ Sleep Talk
~ Seismic Toss
~ Ice Punch
Status taker. Generally awesome. Counters a lot of stuff too.
Going through my threat list, the biggest problem would appear to be Metagross. Anything else?
Team at a glance;







Infernape @ Choice Scarf
Nature: Rash
Ability: Blaze
EV's: 252Sp.Atk, 232Spe, 24Atk
~ Overheat
~ Hidden Power [Electric]
~ Grass Knot
~ Close Combat
This has always worked better for me than the standard Mixape. EV's make sure it beats Adamant ScarfChomp. Hp Electric for Gyarados.

Gyarados @ Leftovers
Nature: Impish
Ability: Intimidate
EV's: 212Hp, 176Def, 122Sp.Def
~ Taunt
~ Thunder Wave
~ Waterfall
~ Avalanche
Just awesome. T-Wave to slow stuff down for Maggy.

Mismagius @ Leftovers
Nature: Timid
Ability: Levitate
EV's: 236Spe, 166Sp.Atk, 108Hp
~ Substitute
~ Shadow Ball
~ Hidden Power Fighting
~ Calm Mind
Gotta love it :) One of the few special sweepers that will actually beat Blissey. EV's beat +Spe Garchomp by one point, taking into account the 30 IV in speed required for Hp Fighting. 108 Hp is nice for Leftovers, with the rest in Sp.Atk.
Considering Taunt over Sub, as I hate being phazed.

Leafeon @ Leftovers
Nature: Relaxed
Ability: Leaf Guard
EV's: 252Hp, 176Def, 82Sp.Def
~ Wish
~ Protect
~ Leaf Blade
~ Baton Pass
Beats T-Bolt Boah, Gyarados, Swampert if they lack Ice Beam, and quite a lot of other stuff too. Also chucks Wishes around, which is always useful.

Drapion @ Leftovers
Nature: Impish
Ability: Sniper
EV's: 252Hp, 252Def, 6Hp
~ Knock Off
~ Whirlwind
~ Night Slash
~ Brick Break
Gets rid of Toxic Spikes, knocks stuff off, and rapes stuff with Night Slash's high crit rate and Sniper. BB for coverage.

Registeel @ Leftovers
Nature: Careful
Ability: Clear Body
EV's: 252Hp, 160Sp.Def, 98Def
~ Rest
~ Sleep Talk
~ Seismic Toss
~ Ice Punch
Status taker. Generally awesome. Counters a lot of stuff too.
Going through my threat list, the biggest problem would appear to be Metagross. Anything else?