Probably will get laughed off the stage or ignored (but that'd be good if others don't take this set seriously).
Anti-Platinum Lead Gyara
Jolly
@Choice Band
252 ATK 252 SPEED 4 HP
-Taunt
-Waterfall
-Earthquake
-Outrage
This guy is not so far off the beaten trail (for gyarados) that it seems insane, but there are some important notable distinctions that probably ought to be pointed out.
Jolly Nature
Jolly Gyara outruns a lot of important leads (that adamant does not), including +speed heatran, smeargle, breloom and metagross. If these guys outspeed you, you know you have a scarfer on your hands.
Choice Band
Choice Band may seem like a ridiculous item on lead Gyara, especially since I've opted to keep Taunt, but it accomplishes a lot.
-It keeps Gyara hitting hard. You lose a LOT of power going from Adamant to Jolly, and Gyara will be missing a lot of important margins against bronzong, metagross, jirachi, swampert and hippowdon.
-You also don't want tanks like Jirachi, Celebi, Starmie, and Zapdoes to be too comfortable coming in. The damage between LO and CB is pretty important (no, I'm not taking time to do calcs for all the different pokes who likely meddle with their spreads a lot anyway).
-CB screws with Trick users. This is probably the most important part of using CB over LO. Trick Gross and Jirachi being stuck into trick v. setting up rocks makes a big difference.
Taunt??
Taunt really fucks with people's minds, especially since most of the pokemon who hate getting taunted are fucked by not just gyara, but by anything once they've been taunted. Either they'll stay in, and let you bring in something to lol off their pathetic attacks and set up your own rocks, or you'll just get a double switch. Even if it's a double switch, you can switch to a "secondary lead" waiting in the wings to set up, while their primary lead has gotten it's game screwed.
Outrage
Gyara pretty much needs a 3rd offensive move to hit those that resist water/ground. The most typical option is stone edge, followed by bounce. Outrage is generally shunned on anything not-dragon, but here it actually find itself very useful.
-Outrage provides 100% accuracy. Screw you stone edge
-Outrage provides terrific coverage with both water and ground attacks
-Outrage hits kingdra, flygon and lati@s, all of whom are important targets. Flygon because Gyara is generally a good check against it, and the others because they love so much to try and check gyarados (especially when they find out it's choiced). Instead, Gyara becomes a check against them (especially against Kingdras trying to set up on teammates). Intimidating and Outraging Kingdra to hell has made gyara especially useful to me.
-Obvious is the benefit of 1hko'ing all those damned dragons-- to hell with Salamence, Lati@s, Flygon and Kingdra. . . . and Dragonite. xD While all of these pokes have sets they can use to beat Gyara (generally involving boosted Draco Meteors), Gyara also can beat a number of these sets, particularly set up/physical ones.
On a note, with no leftovers, SR weak, Choiced (and therefore forced to switch in/out a lot) and no defensive ev investment, CB-Gyara is on a crash-course from the get go. Don't get too attached to it, abuse it like a red-haired step child and don't be afraid to throw it into the enemy lines of fire when necessary (intimidating the enemy as it falls).
Keeping CB-Gyara's suicidal mentality in mind, Outrage fits in nicely, letting Gyara achieve a lot in its limited time. In the early game, trying to predict is a bitch, and sometimes the raw force of a 120 base dragon attack is the best general answer. Sure Outrage locks you in, but even non-STAB, CB Outrage coming from 125 base attack is not easy to set up on (especially when no one sees it coming, therefore no one knows to throw a steel type out infront of it until outrage is practically over or gyara is practically dead from sand). As an additional deterrent, most steel types are not fond of trying to switch into Gyara's general onslaught of Waterfalls and Earthquakes.
Against Typical Leads:
Outsped and 1hko'd by waterfall. Screw you Shuca berry.
Scarf Jirachi . . . Intimidate + Water Type takes Iron Head out of the picture, and weakens thunderpunch. Earthquake wallops it. Waterfall can also 2hko some ev spreads. If it tries to trick you it gets locked into trick. Just make sure not to go for the second earthquake or prepare to let enemy flyging type come in.
This one can be a bitch. Stupid Clear Body . . . Taunt is the safe way to go, pretty much taking SR out of the picture. If they trick you a scarf, they're forced to switch (locked into trick, but also taunted). If they go to SR without scarf they just get taunted. The unfortunate thing is that after taunting you're forced to switch out, meaning they get a free turn to *possibly* attack you (have a Metagross counter on hand). Of course they could get scared off by potential LO earthquake and you'll get a double-switch (bring a set-up poke in the wings). The worst case scenario is Thunder Punch Metagross, but they're rare as leads (since gyara is rare as a lead).
If you hate weird mind games with choice'd taunt, you can always just earthquake it for massive damage. Waterfall can 2hko some of the less-bulky spreads.
Gets SR Up, but gets the shit beat out of it, basically leaving you at 6 v. 5. Endeavor Infernape can screw you, but eh . . . you can't win 'em all.
Have a bulky TTar on your team. Period. Waterfall the first turn to knock the lights out of azelf. Then bring in ttar. With any luck, you can kill it with sand, or it will explode. After intimidate Azelf' Explosion does lol damage unless it invests heavily in attack. Similar to Infernape, you're starting the game 6 v. 5, but with the enemy having SR up (a favorable result in my book).
It's getting SR up, but you're taking it down a peg with waterfall. If you have a scarf flygon on your team, bring it in after your first attack to kill aero with u-turn. Otherwise, you could have some issues.
1 of 2 things can happen here. Either you taunt these guys and turn them into set up fodder, or they sleep you. In the case of the latter you know that they're scarfed, and that you've successfully activated sleep clause (while still being able to abuse intimidate) while they now have a (relatively) unusable poke on their team.
Intimidate helps. First Waterfall while they D-Punch. Now switch to Swampert (in this case you need neutral nature + some speed evs)/Flygon to absorb thunderpunch/stone edge and finish them off.
You've already kind of screwed the baton pass game with intimidate. You then have to play a guessing game between taunt and waterfall. Have fun.
Waterfall will leave this heavily damaged or even 1hko depending on their spread. In addition, Flinch can and will come into play. Intimidate also weakens its Stone Edge, and the immediate threat of death by waterfall keeps stealth rock off the field.
The following are Gyarados' bitches:
(Against these two it's really fun to switch in a CB scizor as they fake out and U-Turn them to death. Intimidate turns them into set-up fodder as well)
Taunt + Intimidate turns these into set-up fodder for your teamates:
The only typical leads that could give you issues Zappy and Abomasnow, and they're still pretty rare as a lead. In that case at least, Zappy cannot set up SR. Just go to your t-wave absorber and have fun. Abomasnow also has no SR. If you really hate Abomasnow, just pack Stone Edge over Outrage.
Notable Team Mates:
No Lead can beat all other leads, so some important team-work is needed to cover the holes.
Tyranitar is Gyara's best friend. TTar switch in is the best way to handle a near-dead azelf, and can be used to finish off infernape too (who will never be using CC against Gyarados). Tyranitar, especially special tyranitar, is also a great switch in to Starmie, Rotom, Zapdos and Jolteon who all love to try to deal with Gyara. Also provides a check to Gengar and Celebi. Sand also removes Vaporeon's Leftovers, important in keeping the little blue mermaid whore from being too much of a whore. Also important for getting rid of hail.
Sand also provides Gyara with a count-down clock. Without LO, Gyara has no way of killing itself, important when you're a sweeper who could potentially be turned into set up fodder-- this is especially important when trying to abuse Outrage.
Absorbs Rock/Electric attacks. Can come in on pokes that Gyara has Taunted/Intimidated and set up its own rocks. Can help kill machamp if it packs some speed.
Also can absorb electric/rock attacks and is very useful for finishing off weakened foes with U-Turn, notably aerodactyle. Also makes an excellent Celebi check of sorts, absorbing t-wave, taking only around 33% from grass knot/energy ball, and able to 1hko with CB or do like 60~70% with Scarf U-Turn.
Yeah, fitting swampert and flygon on the same team can be difficult. >.>