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Heatran

ListEntry

Table of Contents

#485

251

ATK

213

DEF

209

STA

Lvl 50Max CP

4244

Lvl 40

3754

Lvl 25Weather Boost

2681

Lvl 20Raids/Eggs

2145

Lvl 15Research

1609

Moves

Fast

Fire Spin

Bug Bite

Charge

PvE Analysis

Where it was once a niche-counter, Heatran's June 2023 update gave it access to Magma Storm, which is everything that it could have realistically hoped for. While not enough to make Heatran a DPS King in such a competitive type, it was more than enough to make it the undisputed TDO option for most raids thanks in part to its phenomenal resistance set that includes a double-resistance to every single type in the game that's weak to Fire. In this regard, Heatran may very well be an optimal counter in some situations despite lagging behind the big-names of the type!
Best PvE Offensive Moveset
Fire Spin + Magma Storm*Best
Fire Spin and Magma Storm* is Heatran’s optimal set.
Fire Blast is a bit behind in DPS, but also less efficient as a 1-bar move. 
Bug Bite is the worse move in the situations where Heatran is useful.
Iron Head is better for attacking Ice and Fairy-types.
Stone Edge has no role on gym or raid offense.
Flamethrower is objectively worse than Magma Storm*

PvP Analysis

Fire Spin + Magma Storm* and Stone Edge
Fire Spin sports slightly above average energy generation, and takes also takes advantage of STAB. 
Magma Storm is recommended due to its cheap cost and STAB. Stone Edge grants the most overall coverage, nailing several Flying-type Pokemon that may not mind Heatran's Fire-type attacks. Earth Power can be used to dispatch opposing Dialga and Heatran more reliably, but its coverage is somewhat redundant otherwise. Iron Head benefits from STAB and costs the second least amount of energy, but its DPE is poor and its coverage isn't amazing. Flamethrower is outclassed by Magma Storm.
Great League
A Great League Heatran can be obtained by trading one from research and rolling very low IVs. Keep in mind that a research Heatran may be rare.
Heatran boasts a unique typing, but lacks the bulk to really make use of it, and its moveset is somewhat middling. Other Fire-type Pokemon such as Talonflame and Skeledirge possess greater bulk and much stronger movesets, making them preferable options even though they lack Heatran's Steel typing.
Ultra League
Heatran has the ability to counter a few big-name Pokemon in the Ultra League, making it a niche pick, but it's not terribly effective outside of its niche. The presence of Registeel makes it severely outclassed as a Steel-type, and it doesn't manage to beat it even with the Fire coverage.
Master League
Relying heavily on its typing to succeed, Heatran's 10 resistances (including a double resistance to Fairy) and solid stats allow it to effectively counter Dialga, Hisuian Avalugg, Lugia, and some Fairy-type Pokemon. Heatran also sets itself apart from other Steel-type Pokemon such as Dusk Mane Necrozma and Solgaleo by having overall positive matchup against them, courtesy of its Fire-type. All of these make Heatran a great Pokemon to pair with Dragon types.
The addition of Magma Storm onto its movepool grants Heatran some much needed speed and reliability, transforming it into a viable pick in the Master League. However, Heatran does have some very abusable weaknesses; care must be taken to ensure that it does not give its opponents too much farm after it wins a matchup.

Great League
A Great League Heatran can be obtained by trading one from research and rolling very low IVs. Keep in mind that a research Heatran may be rare. Heatran boasts a unique typing, but lacks the bulk to really make use of it, and its moveset is somewhat middling. Other Fire-type Pokemon such as Talonflame and Skeledirge possess greater bulk and much stronger movesets, making them preferable options even though they lack Heatran's Steel typing.
Ultra League
Heatran has the ability to counter a few big-name Pokemon in the Ultra League, making it a niche pick, but it's not terribly effective outside of its niche. The presence of Registeel makes it severely outclassed as a Steel-type, and it doesn't manage to beat it even with the Fire coverage.
Master League
Relying heavily on its typing to succeed, Heatran's 10 resistances (including a double resistance to Fairy) and solid stats allow it to effectively counter Dialga, Hisuian Avalugg, Lugia, and some Fairy-type Pokemon. Heatran also sets itself apart from other Steel-type Pokemon such as Dusk Mane Necrozma and Solgaleo by having overall positive matchup against them, courtesy of its Fire-type. All of these make Heatran a great Pokemon to pair with Dragon types. The addition of Magma Storm onto its movepool grants Heatran some much needed speed and reliability, transforming it into a viable pick in the Master League. However, Heatran does have some very abusable weaknesses; care must be taken to ensure that it does not give its opponents too much farm after it wins a matchup.