Originally Posted by Fat HD
I personally use Cyclohm as a scarfed revenge killer, and he works wonders. Heres the set:
Cyclohm@ChoiceScarf
EVs: 86 HP/252 Spe/172 SpA
Nature: Timid
Moveset:
~Draco Meteor
~Surf
~Flamethrower
~Shadow Ball
All of the dragons are revenge killed, Heatran, Nape and other Ground/Rock/Fire types: Flamethrower takes on Steels, Celebis and anything weak to it and Shadow Ball takes things like the Rotoms, Gengar and Azelf. He's a reliable Revenge killer and could also sweep late game with Draco Meteor when steels and special walls are gone. The 86 in HP is for a little extra bulk.
I don't really see the point of running a Scarf on something with 112 attack. The only usable Scarfers with attacking stats below 130 are ones that use Trick or U-Turn (or possibly Dugtrio, but they typically run Band since they're so fast anyway). Cyclohm can't do those things and isn't quite as useful as a revenge killer/wall crippler imo, but if you like it, I have some suggestions to improve the set.
I'm not sure why you're running max speed on this thing. At max, you're still just short of outrunning SubPetaya Empoleon (which would really only be of note if you ran Thunderbolt) and you don't really outrun anything of note. Here are some other speed numbers I would consider:
236 EVs: 420. The highest I would go with a Scarf set, to outrun scarfed, neutral nature base 90s, of whom I could only conceive of Porygon-Z or Lucario effectively doing (and if they run +Spe, you lose anyway).
232 EVs: 418. Outruns Timid ScarfTran. Probably the level I would be most comfortable at.
200 EVs: 405. Outruns Adamant Scarfed Heracross.
176 EVs: 394. Outruns max speed base 130s, max speed Scarfed base 70s, and is the lowest I would go.
And you should max SpA, because the HP isn't helping you much at all. You'll still survive CB Mamo Ice Shard (591 Atk vs 272 Def & 357 HP (40 Base Power): 188 - 224 (52.66% - 62.75%)) with no EV investment in defenses, and you'll have a roughly 1/4 chance of OHKOing w/ Flamethrower if SR is on the field (Fire Blast ups it to 87% and Overheat guarantees it, if you're considering switching to higher-powered moves, which I think you should to make up for the lower SpA). If you max SpA, you can still put the remaining EVs that you took out of speed into HP.
Even at 323 SpA, you still only have a 46% chance of OHKOing Naive Azelf, 15% chance of OHKOing Gengar, and 0% chance of OHKOing Starmie or Scarf Rotom with Shadow Ball if they switch into SR and don't invest at all in defense (which they don't). Draco Meteor guarantees KOs on all of them (except Rotom, which has 46% chance to OHKO, and the RestTalk set takes <50% max damage, so you can forget about that) w/ SR, so Shadow Ball is really not terribly useful for revenge killing unless the opponent's already taken some good damage. I would replace it with Thunder or Thunderbolt for STAB and a good way to take out Adamant Gyarados after a DD.
And I wouldn't be so quick to saying Heatran is revenge-killed by Surf:
323 Atk vs 248 Def & 323 HP (95 Base Power): 178 - 210 (55.11% - 65.02%)
And here's if you switch in to 4 HP/ 0 SpD Offensive CM Latias after a CM to revenge it:
323 Atk vs 444 Def & 302 HP (140 Base Power): 218 - 260 (72.19% - 86.09%)
You would need Overheat to guarantee a 0/0 Magnezone KO without taking a big hit from HP Ice.
And I could go on, but the point I'm trying to make is that ScarfOhm is kind of a waste of potential. Even with the surprise factor of running Scarf, you're not getting the necessary damage output to take advantage of it. Once the opponent sees you're faster than its Latias, he/she'll switch it out and save it for later and all you've done is locked yourself into a move and given the opponent the upper hand. But hey, if it's working for you, I say keep with it.