[SET]
name: Assault Vest
move 1: Earth Power
move 2: Tera Blast
move 3: Magma Storm / Lava Plume
move 4: Flash Cannon / Heavy Slam
item: Assault Vest
tera type: Grass / Fairy
ability: Flash Fire
nature: Modest
evs: 244 HP / 4 Def / 252 SpA / 4 SpD / 4 Spe
[SET COMMENTS]
* While Heatran's typing and bulk with Assault Vest make it an incredible Flutter Mane check, its offensive coverage and strong Terastallization opportunities also make it a potent all-around threat.
* **Magma Storm versus Lava Plume**: Magma Storm is usually preferred for its higher damage output and residual trapping damage, but the 75% accuracy can be problematic. Lava Plume is weaker but has perfect accuracy as well as a 30% burn chance that can ruin many of Heatran’s checks.
* **Flash Cannon versus Heavy Slam**: Flash Cannon compliments Magma Storm well, dealing significant damage to Chien-Pao, Dragonite and Iron Bundle without having to worry about accuracy or weight. On the other hand, Heavy Slam can be used to OHKO offensive Flutter Mane even with a negative Attack nature.
Tera Types
========
* **Tera Dependency - Medium / High**: Heatran's bulk and unique typing are extremely valuable on their own, but aggressive use of Terastallization can give Heatran incredible momentum when employed correctly.
* **Grass**: Tera Grass often devastates Water- and Ground-type checks by turning both types into resists, while Tera Blast will easily tear through its biggest check in Urshifu-R.
* **Fairy**: Tera Fairy gives Heatran a more balanced typing than Tera Grass into heavy hitters like Chien-Pao and Iron Bundle, and Tera Blast hits Urshifu-R as well as Dragonite for super-effective damage.
* **Bug**: Tera Bug provides both a Ground- and Fighting-type weakness while avoiding problematic weaknesses like Ice. Tera Blast won't provide much extra coverage, but it does let you hit opposing Heatran that rely on Tera Grass to win the mirror.
Abilities
========
* **Flash Fire**: While Fire-type coverage is rarer in the current metagame, it makes Heatran more consistent against Chi-Yu and allows it to switch into opposing Magma Storms without issue.
* **Flame Body**: While Flame Body’s burn chance can cripple many physical attackers for the rest of the match, its biggest target in Urshifu-R normally runs contact protection.
Alternate EV Spreads
========
* All EV Spreads minimize Stealth Rock damage by having a real HP stat that is 1 lower than being divisible by 4.
* **244 HP / 4 Def / 52 SpA / 124 SpD / 84 Spe with Calm**: This spread can take up to three Shadow Balls from Timid Choice Specs Flutter Mane and two Tera Water Tera Blasts from unboosted Modest Flutter Mane. The Speed investment lets you outrun Gholdengo with 20 Speed EVs–the standard for defensive sets–while also outspeeding uninvested Rotom formes, Dragonite, and Cresselia.
* **4 HP / 252 SpA / 252 Spe with Modest**: A full offensive spread lets Heatran catch targets like Dragonite that don't fully invest in Speed, but Heatran will always be 2HKOed by offensive Flutter Mane's Tera Water Tera Blast.
name: Assault Vest
move 1: Earth Power
move 2: Tera Blast
move 3: Magma Storm / Lava Plume
move 4: Flash Cannon / Heavy Slam
item: Assault Vest
tera type: Grass / Fairy
ability: Flash Fire
nature: Modest
evs: 244 HP / 4 Def / 252 SpA / 4 SpD / 4 Spe
[SET COMMENTS]
* While Heatran's typing and bulk with Assault Vest make it an incredible Flutter Mane check, its offensive coverage and strong Terastallization opportunities also make it a potent all-around threat.
* **Magma Storm versus Lava Plume**: Magma Storm is usually preferred for its higher damage output and residual trapping damage, but the 75% accuracy can be problematic. Lava Plume is weaker but has perfect accuracy as well as a 30% burn chance that can ruin many of Heatran’s checks.
* **Flash Cannon versus Heavy Slam**: Flash Cannon compliments Magma Storm well, dealing significant damage to Chien-Pao, Dragonite and Iron Bundle without having to worry about accuracy or weight. On the other hand, Heavy Slam can be used to OHKO offensive Flutter Mane even with a negative Attack nature.
Tera Types
========
* **Tera Dependency - Medium / High**: Heatran's bulk and unique typing are extremely valuable on their own, but aggressive use of Terastallization can give Heatran incredible momentum when employed correctly.
* **Grass**: Tera Grass often devastates Water- and Ground-type checks by turning both types into resists, while Tera Blast will easily tear through its biggest check in Urshifu-R.
* **Fairy**: Tera Fairy gives Heatran a more balanced typing than Tera Grass into heavy hitters like Chien-Pao and Iron Bundle, and Tera Blast hits Urshifu-R as well as Dragonite for super-effective damage.
* **Bug**: Tera Bug provides both a Ground- and Fighting-type weakness while avoiding problematic weaknesses like Ice. Tera Blast won't provide much extra coverage, but it does let you hit opposing Heatran that rely on Tera Grass to win the mirror.
Abilities
========
* **Flash Fire**: While Fire-type coverage is rarer in the current metagame, it makes Heatran more consistent against Chi-Yu and allows it to switch into opposing Magma Storms without issue.
* **Flame Body**: While Flame Body’s burn chance can cripple many physical attackers for the rest of the match, its biggest target in Urshifu-R normally runs contact protection.
Alternate EV Spreads
========
* All EV Spreads minimize Stealth Rock damage by having a real HP stat that is 1 lower than being divisible by 4.
* **244 HP / 4 Def / 52 SpA / 124 SpD / 84 Spe with Calm**: This spread can take up to three Shadow Balls from Timid Choice Specs Flutter Mane and two Tera Water Tera Blasts from unboosted Modest Flutter Mane. The Speed investment lets you outrun Gholdengo with 20 Speed EVs–the standard for defensive sets–while also outspeeding uninvested Rotom formes, Dragonite, and Cresselia.
* **4 HP / 252 SpA / 252 Spe with Modest**: A full offensive spread lets Heatran catch targets like Dragonite that don't fully invest in Speed, but Heatran will always be 2HKOed by offensive Flutter Mane's Tera Water Tera Blast.
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