So I theorymon'd up this new set for Ambipom using those new moves he picked up in Platinum. It is designed to force the hand of the two most common suicide leads on the Suspect Ladder: Aerodactyl and Azelf (and can also handle Deoxys almost as well in Standard). Before I get into the mechanics, here's the set:
Ambipom @ Life Orb
EVs: 112 HP / 180 Atk / 216 Spe
Nature: Jolly
Ability: Technician
- Fake Out
- Return
- Ice Punch
- Taunt
The idea of the set is that, faced with either an Aerodactyl or Azelf lead, Ambipom can force them to make a choice: Either set up rocks and die, or attack Ambipom and die. Whatever they choose, their effect on the match will be significantly lowered (especially in Azelf's case, who usually likes Exploding after setting up Rocks). Deoxys gets a little more leeway, but is still forced into a decision. Here's how:
Ambipom vs Naive, 0 HP / 0 Def Suicide Azelf
Fake Out: 46.39% - 54.63%
Return: 78.35% - 92.09%
Minimum Damage: 124.74%
Ambipom vs Jolly, 4 HP / 0 Def Aerodactyl
Fake Out: 23.25% - 27.57%
Ice Punch: 79.06% - 92.02%
Minimum Damage: 102.31%
Ambipom vs Timid, 252 HP / 4 Def DualScreen Deoxys
Fake Out: 35.85% - 42.76%
Return: 60.52% - 71.38%
Minimum Damage: 96.37%
As you can see, with the exception of Deoxys, Ambipom is assured comfortable 2HKO's on these common set-up leads. Even Deoxys is 2HKO'd most of the time (unless it sets up Reflect, obviously). In Azelf and Aerodactyl's case, this means they only have one turn to do
anything in the match, and thanks to Taunt, Deoxys can only set up one of either Reflect/Light Screen/Stealth Rock before being forced to retreat (if Deoxys uses that turn to Taunt, it runs the risk of dying to Return. It's a guessing game, here).
But of course you may have noticed a problem: The Life Orb. In order to Fake Out + Second Attack, Ambipom will be taking 20% Life Orb recoil. On the second turn, Azelf and Aerodactyl have a chance to attack you. Can Ambipom really survive all this and still do his job?
Yes, he can.
Naive, 252 SpA Azelf Psychic vs Ambipom
63.22% - 74.60%
Jolly, 252 Atk Aerodactyl Stone Edge vs Ambipom
61.44% - 72.72%
Neither one of them can achieve the 80% necessary for Ambipom to be killed after his second recoil from Life Orb (and even if they could, Ambipom would still kill them before Life Orb kills him).
To keep the advantages coming, Ambipom hits 352 speed with the given spread, outrunning Timid Gengar and Taunting the incoming Hypnosis. Gengar's Life Orb'd Focus Blast will easily OHKO, of course, but without the risk of being put to sleep, a lot of things become better switch-ins to Gengar. Any Timid Gar running HP Ice over Focus Blast (so like, Hypnosis/Shadow Ball/Thunderbolt/HP Ice) can only 2HKO with Thunderbolt, and is 2HKO'd by the faster Ambipom with Ice Punch.
Taunt also disables the slower utility Pokemon (ie. everyone who isn't Azelf, Aerodactyl or Deoxys) from using their set-up moves at all, which means this Ambipom is capable of either stopping Stealth Rock outright, or at least making sure that whatever lays it is not going to have any further input into the match.
I haven't actually used this yet, but it looks like a lot of fun to screw with three very common leads and lower the threat level of many others. Personally, I'd recommend this for Suspect more so than Standard; The match-up against Deoxys-E is far from a sure thing, requiring a little luck on the RNG and winning the guessing game on Turn 2. Still, on paper at least he's looking like a fantastic little anti-lead.