This idea was actually kinda stolen after I battled Ooka's ice team :P
Registeel@Leftovers
Ability: Clear Body
Nature: Adamant
252 HP/126 DEF/ 126 SpD
- Substitute
- Protect
- Ice Punch
- Earthquake
Yes. I use this set in OU. Needless to say, it's working wonders for me. With SR+Spikes support along with Sandstorm in play the whole time, Steel becomes the best wall. The HP of the sub is pretty high up and with protect, it stays a turn longer then it would. This may seem like a turn wasted but keep in mind that all the while, the opponent is being hit by SS while Steel is recovering with Leftovers. Steel's offense is really bad though. However, with Ice Punch and Earthquake, it has pretty good coverage over most pokemon. Earthquake with its huge base power will typically 2HKO pokes, if not OHKO with all the help going on. Ice Punch will be able to OHKO Flying/Dragon types, i.e. Salamence, after SR/Spikes/SS damage. With these two moves, Steel will be hitting most for at least neutral damage. Though Steel can be used decently on offense, its main use is to stall, stall, and stall again so the opponent picks up residual damage. Your opponent will most likely try to switch in a fire type. All you can do here is pray to Arceus that it isn't Heatran as you will must likely be dead within two turns. Unless you can stall long enough, but Heatran's typing prevents SS's effect on it so... Switch out :P
So you can kinda understand Steel's role more I have:
Hippowdon < Lead/Sandstorm/Stealth Rock
Forretress < Spikes/Rapid Spinner
Gligar < Pure Baton Passer
Metagross < Baton Pass Receiver/Wall/Tank
Magnezone < Steel Killer
Hippowdon will set up the whole game for me. With Ice Fang and Slack Off, you can bet it'll be annoying the opponent. Don't forget it's huge Def and HP(both have EVs invested in). Forretress will add even more to the residual damage. If I have the chance to set up 3 Spikes, then Salamence will KO upon the switch in :D Gligar will find some random poke to switch in on. It has Sand Veil along with Yache Beryy :D :D Anyways, it'll Rock Polish and SD up and then... PASS TO METAGROSS. Now you have to deal with a huge Wall and Tank. Metagross also has a moveset which I will not reveal... however, let me say it will take down those annoying Gyarados, Starmie, and even Scizor. Magnezone can deal with Gyarados, etc. should I not have the chance to BP to Metagross. Either way, this team is pretty buff if I say so ^^,
Well first of all, basically every special attacker in existence forces you to sacrifice something lol. Gyarados easily can get in a Dragon Dance and sweep you. Since you were in denial on the server I'd be happy to explain how it does this. Adamant max Speed Gyarados (the slowest DDer you're going to find that carries Earthquake) gets 391 Speed after a Dragon Dance. Timid 252 Speed Choice Scarf Magnezone gets 360 Speed. In other words, you're going to get outsped, and I'm pretty sure your set isn't even the Scarfer since you lectured me on Magnet Rise, even though Gyarados is faster and will KO with Earthquake anyway lol. The best part is that this "great wall" Registeel is the perfect set-up fodder for Gyarados to sweep your team. And yes, it blows through Metagross.
Back to special attackers, Starmie goes completely unchecked, and you basically have to hope that Mag is still alive to take a Surf or Hydro Pump so it can KO with Thunderbolt, but any Starmie user is smart enough to switch and just bring Starmie in later to crush you. Heatran, particularly those with Substitute, easily run over your team. SpecsTran's biggest counter literally is Fire Blast's accuracy and PP. And yes, it's faster than everything bar Gligar (don't you mean
GLISCOR lol ?_?), so you can't do a whole lot to it unless Metagross is in with Speed passed, in which case *Metagross counter* will come in and wall you to hell anyway.
But as for the same itself, it's insane set-up fodder. And truthfully, you could run that with any SS-immune Pokemon in the game. Actually, Metagross is a much better choice since its Earthquakes and Ice Punches do more than 2 damage. Speaking of which, it's some obvious insane theorymon to suggest that Earthquake will 2HKO most things around...are you serious? Swampert's Earthquakes (which have STAB and come off of 110 base Attack) hardly do any damage. Ice Punch isn't even going to OHKO Salamence and other Dragons, and bulky Pokemon weak to it like Celebi take basically nothing.
tl;dr: Registeel versus common team types:
Against offensive teams, this won't be able to set up and you will be overwhelmed quite quickly.
Against stall teams, they will just send in Skarmory or Forretress, Spike the field, block your Rapid Spin once Registeel flees, and wall your entire team with Rotom-A or even Spiritomb or Sucknoir if it's WiFi. And since you have no offense or no Spin blocker of your own, stall will quite easily wear you down. And yes, Skarmory does carry Shed Shell a lot.
Against balanced, Registeel is just going to be stalled out. Even Earthquake doesn't hurt even Blissey much at all. In fact, it does this --> [186 Atk vs 130 Def & 714 HP (100 Base Power): 103 - 122 (14.43% - 17.09%)]. 17% max damage...oh no! The best part is that Blissey is faster. So you have basically no chance to beat it lol. And that's not even the physical wall.
Against rain, SS goes out the window and Hippowdon dies the second it tries to do something about it. Registeel is easily 2HKOed by STAB Rain boosted Surfs and Earthquake does nothing to Rain Dance sweepers not named Kabutops. So yes, they can set up on Regisetupfodder.
So no, your set won't work. Normally I don't go into so much detail and elaboration but since most of the stuff you said on the server was ridiculous/not true (Gyarados takes 50% from Stealth Rock? yeah okay), I figured I'd explain why this is pretty terrible. Since virtually every type of team mows it down, there isn't any point in using it.
PS: Salamence is immune to Spikes, so getting 3 layers won't mean it is knocked out coming in, lol. In fact, even if it was hit by Spikes, it would only lose 25% of its health, 50% with Stealth Rock.