General Heatran has been a great Pokémon in OU ever since it arrived in DP. Heatran has solid stats all around: its 91/106/106 defences mean it can take hits well while its 130 base Special Attack means it can dish them out too. While it lost its Ghost- and Dark-type resistances, it gained another x4 resistance to Fairy-type moves. Its typing also means that it's immune to burn and poison. It also has a great support movepool including Stealth Rock, Will-O-Wisp, Roar, and Taunt, which means it can run offensive, defensive, and support sets equally well, making Heatran easy to incorporate into almost any team. Heatran also has the useful ability to check dangerous Pokémon like Talonflame and Latios. OU is kinder to it this generation: Terrakion, Politoed, Jellicent, Starmie and Dugtrio have all left the tier. There is also no more permanent rain. Nevertheless, Heatran has its faults. No reliable recovery undermines its great bulk, and its offensive movepool is rather small. It also struggles with common Pokémon like Landorus-T, Greninja, and Keldeo, while several of the Pokémon it used to wall are finding ways of getting around it, such as Latios running Earthquake. As good as its typing is, it also gives Heatran weaknesses to common Ground and Fighting moves, with the former being a x4 weakness. Also in the new generation, several of its attacks have been weakened, such as Fire Blast and Hidden Power. Specially Defensive Heatran @ Leftovers Trait: Flash Fire EVs: 248 HP / 220 SDef / 40 Spd Calm Nature - Lava Plume / Flamethrower - Toxic / Will-O-Wisp - Stealth Rock - Earth Power / Roar This set capitalises on Heatran's defensive capabilities. Lava Plume serves as Heatran's STAB move. Its high burn rate means most physical attackers will have second thoughts about switching in. If you use Will-O-Wisp in the second slot, use Flamethrower instead of Lava Plume since the higher burn rate is unnecessary. Stealth Rock is used to aid Heatran's team. Earth Power can be used to hit opposing Heatran, while Roar prevents Heatran becoming set-up fodder. 248 HP EVs maximise Heatran's overall bulk. 40 Speed EVs let Heatran outrun max Speed Adamant Azumarill and burn it before it can attack. The rest is placed in Special Defence for bulk. Alternatively, a spread of 248 HP / 52 SDef / 208 Spd with a Timid nature can be used to outrun max Speed Mega Tyranitar and burn it before it starts a sweep. Choice Scarf Heatran @ Choice Scarf Trait: Flash Fire EVs: 4 HP / 252 SAtk / 252 Spd Modest Nature (+SAtk, -Atk) / Timid Nature (+Spd, -Atk) - Fire Blast / Overheat - Earth Power - Ancient Power / Hidden Power Ice - Flash Cannon / Flamethrower / Hidden Power Ice Heatran's only disappointing stat is its Speed. Choice Scarf patches that up, allowing Modest Heatran to outrun 252 Speed Timid Greninja. Overheat is Heatran's most powerful STAB move and is recommended due to this set's hit-and-run nature, but Fire Blast has more consistent power. Earth Power wrecks most opposing Fire-types. Ancient Power OHKOes Volcarona and Talonflame; Hidden Power Ice OHKOes Gliscor and Dragonite after Stealth Rock. The last slot is best used for a reliable STAB move. Flash Cannon can be used to badly wound Tyranitar, while Flamethrower is more reliable late-game. Alternatively, Hidden Power Ice can be used with Stone Edge if you need a reliable way to hit Dragonite, Gliscor and Landorus-T. EVs maximise Speed and power. This set is good at getting surprise kills on Pokémon that expect to outrun and KO, like Mega Pinsir. Stallbreaker Heatran @ Air Balloon Trait: Flash Fire EVs: 4 HP / 252 SAtk / 252 Spd Timid Nature (+Spd -Atk) Taunt Will-O-Wisp / Toxic Fire Blast / Flamethrower Earth Power This set is designed to render most walls useless. Taunt shuts down defensive Pokémon and boosting sweepers. Will-O-Wisp can be used to cripple incoming physical attackers like Landorus-T, Azumarill and Tyranitar. Toxic can be used to cripple walls like Unaware Clefable, defensive Rotom-W (although Heatran still shouldn't stay in on it) and Chansey that lack Heal Bell or Aromatherapy. As for STABs, go with Fire Blast if you prefer power, Flamethrower if you prefer accuracy. Earth Power scores supereffective hits on Rock types and opposing Fire types. Max Speed and a Timid nature is needed to outrun Adamant Excadrill and either KO or cripple it before it can OHKO with Earthquake. Air Balloon is used to give Heatran a temporary immunity to its X4 weakness, thus increasing switch in opportunities. Offensive Stealth Rock Heatran @ Air Balloon / Leftovers Trait: Flash Fire EVs: 4 HP / 252 SAtk / 252 Spd Timid Nature (+Spd -Atk) Stealth Rock Fire Blast Earth Power Hidden Power Ice / Ancient Power Meet one of the most reliable Stealth Rock setters in OU. In addition to setting up Stealth Rock, this set beats most of the tier's Rapid Spinners and Defoggers, only losing to the uncommon Latias. Stealth Rock is the crux of this set, helping Heatran and its teammates get additional KOs. Fire Blast serves as the STAB move, 2HKOing Zapdos and Mandibuzz (former needs Stealth Rock to guarantee the 2HKO). Earth Power hits Rock types and opposing Fire types hard. Hidden Power Ice OHKOes Gliscor and Landorus-T most of the time, while Ancient Power can be used to nail Talonflame and Volcarona. The EVs maximise Speed and Power. A Timid nature is a must, as it lets Heatran outrun Adamant Excadrill. Synergy Mega Venusaur has superb synergy with Heatran, resisting Water and Fighting moves while Heatran resists Flying and Psychic moves. Clefable and Sylveon can take out the Fighting-types that give Heatran grief and pass Wishes to keep it healthy. Offensive Pokémon enjoy having the sets that use Stealth Rock around for the extra O-2HKOs they can get. Bulky Water types are good teammates too, able to switch in on the Water moves Heatran fears, while it can take the Grass type moves for them. Assault Vest Azumarill resists Water and Fighting moves, and counters Keldeo, a Pokémon Heatran struggles with. Gyarados resists Water and Fighting moves while being immune to Ground ones - it also greatly appreciates having a way to get rid of Ferrothorn. Choice Rotom-W can lure in and cripple special walls with Trick, while being immune to the Ground moves Heatran draws in. Heatran can in turn take the Grass moves aimed at Rotom-W, as well as the stray Toxics. Many of the Fighting-types Heatran fears also make good partners. Conkeldurr and Poison Heal Breloom (once its Orb has activated) can switch in on anything Chansey does and smash it to pieces, while Heatran can take the Flying, Psychic and Fairy moves (and Fire moves in Breloom's case) they draw in. Other Options A full-on Toxic stall set could work with Toxic, Substitute, Protect and Lava Plume / Flamethrower. If you choose to do that, use the set-up of the specially defensive set. A Weather Trapper set with Sunny Day, Magma Storm, and Solar Beam could be used, but with the death of weather wars, it's rather obsolete. Magma Storm could be used on the Stallbreaker set to trap the likes of Chansey. Heatran's old TormenTran set could be run to deal with many of its usual checks and any Choice item user - however with stall teams being much rarer now it's not nearly as valuable. Heatran can attempt to sweep with Flame Charge, but it lacks a way of boosting its Special Attack and is easily walled. Likewise, Heatran can use Power Herb with Solar Beam to help teams that run Flying-type Pokémon. A RestTalk set could also be done but doesn't accomplish anything the existing specially defensive set doesn't. A Choice Specs set makes for a good wallbreaker, but Heatran's lacklustre Speed hinders it in this role. Checks and Counters Rotom-W is one of the best checks, able to 2HKO offensive sets with Hydro Pump while only fearing Toxic. Chansey walls Heatran with ease and can use Natural Cure or Heal Bell to rid herself of status, but it will hate Taunt. Conkeldurr can handle anything the defensive sets do and wreck them with Drain Punch, but Fire Blast will sting. Greninja and Keldeo outrun and OHKO with their respective super effective STABs. Gyarados, its mega evolution, and Azumarill can take it down with their Water STAB moves, but both are crippled by burn. Tyranitar can OHKO with Earthquake or Superpower, but Earth Power and Flash Cannon will hurt and it will also hate a burn. Thundururs can shut down defensive sets with Taunt and smash offensive ones with Focus Blast, but offensive sets do massive damage with Fire Blast. Faster Ground-types like Jolly Excadrill, Gliscor, both formes of Landorus, and Garchomp outrun and OHKO with their respective Ground STAB moves, but none can safely switch in on offensive sets. In addition, apart from special attacking Landorus-I, all greatly fear burns. Latios can lure it in and OHKO with Earthquake or 2HKO with a Life Orb-boosted Surf.