I've spent some time working on this team and I have tested it many times on Shoddy and on the DS. My conclusion is that the team has issues with Earthquake; specifically ones coming from Choice Scarf/Band users. I'm not sure on what to do to handle those pesky Pokemon. Well here's the team.
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Team At a Glance:
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Froslass @ Focus Sash
Ability: Snow Cloak
Nature: Timid
EVs: 252 Sp. Attack/252 Speed/4 HP
-Spikes
-Taunt
-Destiny Bond
-Ice Beam
Froslass is perfect as a lead because she out-speeds most opposing leads. The first move I would use would either be Spikes or Taunt. If I know the opponent is going to switch Pokemon, then I use Spikes. Otherwise, I'd use Taunt. Froslass has been very successful in setting up 2 to 3 layers of Spikes. Destiny Bond is to force the opponent to switch if their Pokemon is powerful enough to OHKO Froslass.
Arcanine @ Life Orb
Ability: Intimidate
Nature: Jolly
EVs: 252 Attack/252 Speed/4 HP
-Morning Sun
-Flare Blitz
-Extreme Speed
-Iron Head
Arcanine is a very good physical sweeper with high speed. Unfortunately, he has a terrible weakness to Earthquake. But against other types of Pokemon, he does major damage. Morning Sun is to heal Life Orb and Flare Blitz damage, Flare Blitz for a powerful STAB move, Extreme Speed for a powerful priority move, and Iron Head for Rock-types.
Porygon-Z @ Life Orb
Ability: Adaptability
Nature: Timid
EVs: 252 Sp. Attack/252 Speed/4 HP
-Nasty Plot
-Tri Attack
-Dark Pulse
-Ice Beam
An amazing special sweeper. Porygon-Z has always been my favorite Nasty Plot user. This Pokemon is devastating to opposing Pokemon with Tri Attack. Dark Pulse is for Ghost-types who resist Tri Attack and Ice Beam is for Dragons.
Registeel @ Leftovers
Ability: Clear Body
Nature: Careful
EVs: 252 HP/252 Sp. Defense/4 Attack
-Stealth Rock
-Thunder Wave
-Earthquake
-Iron Head
Registeel is a great Pokemon as a special wall. He is resistant to most special moves. If Fire types come in, then I can switch in Milotic. Stealth Rock is for an extra entry hazard, Thunder Wave to slow down fast Pokemon, Earthquake for opposing Steel-types, and Iron Head for a decent STAB move.
Clefable @ Toxic Orb
Ability: Magic Guard
Nature: Adamant
EVs: 252 HP/252Attack/4 Speed
-Protect
-Softboiled
-Facade
-Meteor Mash
The typical Toxic Orb abuser. Protect is used to activate Toxic Orb, Softboiled to recover damage, Facade as a powerful STAB move, and Meteor Mash for Rock-types and the chance to raise the attack stat. The Pokemon has problems with mostly Ghost-types because of their resistance to Normal attacks. But that's where I switch in Porygon-Z or another Pokemon.
Milotic @ Leftovers
Ability: Marvel Scale
Nature: Bold
EVs: 252 HP/252 Defense/4 Sp. Attack
-Recover
-Surf
-Ice Beam
-Hidden Power Grass
I realized that since she is neutral to Earthquake, raising her Defense would be a good idea. Basically I switch in Milotic whenever a Pokemon is giving Registeel trouble. The Defense EVs allow her to take Fighting and Ground attacks that hurt Registeel. She has a great Sp. Defense that will protect her from many attacks. Recover is for healing, Surf for a powerful STAB move, Ice Beam for annoying Dragons with Earthquake, and Hidden Power Grass for opposing Water-types.
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Team At a Glance:






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Froslass @ Focus Sash
Ability: Snow Cloak
Nature: Timid
EVs: 252 Sp. Attack/252 Speed/4 HP
-Spikes
-Taunt
-Destiny Bond
-Ice Beam
Froslass is perfect as a lead because she out-speeds most opposing leads. The first move I would use would either be Spikes or Taunt. If I know the opponent is going to switch Pokemon, then I use Spikes. Otherwise, I'd use Taunt. Froslass has been very successful in setting up 2 to 3 layers of Spikes. Destiny Bond is to force the opponent to switch if their Pokemon is powerful enough to OHKO Froslass.

Arcanine @ Life Orb
Ability: Intimidate
Nature: Jolly
EVs: 252 Attack/252 Speed/4 HP
-Morning Sun
-Flare Blitz
-Extreme Speed
-Iron Head
Arcanine is a very good physical sweeper with high speed. Unfortunately, he has a terrible weakness to Earthquake. But against other types of Pokemon, he does major damage. Morning Sun is to heal Life Orb and Flare Blitz damage, Flare Blitz for a powerful STAB move, Extreme Speed for a powerful priority move, and Iron Head for Rock-types.

Porygon-Z @ Life Orb
Ability: Adaptability
Nature: Timid
EVs: 252 Sp. Attack/252 Speed/4 HP
-Nasty Plot
-Tri Attack
-Dark Pulse
-Ice Beam
An amazing special sweeper. Porygon-Z has always been my favorite Nasty Plot user. This Pokemon is devastating to opposing Pokemon with Tri Attack. Dark Pulse is for Ghost-types who resist Tri Attack and Ice Beam is for Dragons.

Registeel @ Leftovers
Ability: Clear Body
Nature: Careful
EVs: 252 HP/252 Sp. Defense/4 Attack
-Stealth Rock
-Thunder Wave
-Earthquake
-Iron Head
Registeel is a great Pokemon as a special wall. He is resistant to most special moves. If Fire types come in, then I can switch in Milotic. Stealth Rock is for an extra entry hazard, Thunder Wave to slow down fast Pokemon, Earthquake for opposing Steel-types, and Iron Head for a decent STAB move.

Clefable @ Toxic Orb
Ability: Magic Guard
Nature: Adamant
EVs: 252 HP/252Attack/4 Speed
-Protect
-Softboiled
-Facade
-Meteor Mash
The typical Toxic Orb abuser. Protect is used to activate Toxic Orb, Softboiled to recover damage, Facade as a powerful STAB move, and Meteor Mash for Rock-types and the chance to raise the attack stat. The Pokemon has problems with mostly Ghost-types because of their resistance to Normal attacks. But that's where I switch in Porygon-Z or another Pokemon.

Milotic @ Leftovers
Ability: Marvel Scale
Nature: Bold
EVs: 252 HP/252 Defense/4 Sp. Attack
-Recover
-Surf
-Ice Beam
-Hidden Power Grass
I realized that since she is neutral to Earthquake, raising her Defense would be a good idea. Basically I switch in Milotic whenever a Pokemon is giving Registeel trouble. The Defense EVs allow her to take Fighting and Ground attacks that hurt Registeel. She has a great Sp. Defense that will protect her from many attacks. Recover is for healing, Surf for a powerful STAB move, Ice Beam for annoying Dragons with Earthquake, and Hidden Power Grass for opposing Water-types.