--- title: "Iron Boulder (#1022): Stats, Weaknesses, Moves & Lore | pokee.si" url: "https://pokee.si/pokemon/iron-boulder" description: "Iron Boulder (#1022): Rock/Psychic-type Paradox Pokémon from Paldea. Base stat total 590. Stats, matchups, evolutions, moves, every Pokédex entry and lore on pokee.si." last_updated: "2026-10-21" publisher: "pokee.si: a Pokédex for families (unofficial fan site)" last_checked: "2026-10-20" --- #1022 · Paldea · Generation 9 · paradox # Iron Boulder Paradox Pokémon · Rock/Psychic-type ![Iron Boulder official artwork](https://pokee.si/img/art/1022.webp) Iron Boulder is a [Rock](https://pokee.si/types/rock)/[Psychic](https://pokee.si/types/psychic)-type Pokémon, the Paradox Pokémon, number 1022 (#1022) in the National Pokédex. It was introduced in Generation 9 and comes from the [Paldea](https://pokee.si/guide/regions/paldea) region. It is 1.5 m tall and weighs 162.5 kg. Iron Boulder is a Rock and Psychic Paradox Pokémon, a metallic bull whose axe-like horns hold stored energy that it uses to plough through everything in its path. A dubious magazine claimed it was a Terrakion modified by an evil organisation, but the Pokédex also says its name comes from a strange object recorded in an old book. ## How to pronounce Iron Boulder Iron Boulder is pronounced **EYE-ern BOHL-der**. The capital letters show the stressed syllable. Listen to Iron Boulder said out loud: [Listen](https://pokee.si/audio/names/1022.mp3) In Japanese it is テツノイワオ (Tetsunoiwao). Hear every other name on the [Pokémon pronunciation guide](https://pokee.si/pronounce). ## Lore ### Biology Iron Boulder is a round, reflective, bull-like Pokémon, 1.5 m tall and 162.5 kg. A rounded black forehead sits above a grey face with digital orange eyes, and two orange-edged, axe-like horns curve forward and can open into round blades as wide as its head. Bulbapedia says its head can rotate fully, and that the orange glow on its head, horns and feet fades to black when it sleeps. ### Behaviour Little is known about how Iron Boulder lives. Perrin's in-game rumour, quoted by Bulbapedia, says it charges its horns with energy and uses them to plough through everything in its path. Bulbapedia, citing the official site, says that energy builds up from light stored in its head. ### Habitat Canon gives no natural habitat. In The Indigo Disk it is found in Area Zero once you start Perrin's questline, and it is a Violet exclusive: Scarlet players must trade for it. It is number 239 in the Blueberry Pokédex. ### Powers Its Ability Quark Drive raises its highest stat on Electric Terrain or when it holds Booster Energy. Its signature move Mighty Cleave wields the light on its head to cleave the target and hits even through protection; only Iron Boulder learns it. It also uses Psycho Cut, Sacred Sword, Megahorn and Stone Edge. Its Speed of 124 is the highest of any Rock or Psychic type introduced in Generation IX, and with 120 base Attack it is a fast physical attacker. ### Name origin Iron Boulder is literal. The Japanese name is Tetsunoiwao (テツノイワオ), which reads as tetsu no iwao, 'iron boulder'. ### Design inspiration Bulbapedia says Iron Boulder is based on Terrakion, designed by Takao Unno. Its extended blades resemble the pointed head of a spade, according to Bulbapedia. This is a fan reading. ### In the games Iron Boulder is one of the Paradox Pokémon added by The Indigo Disk for Violet. Bulbapedia lists it as unobtainable in Legends: Z-A. ### Fun facts - Iron Boulder and Gouging Fire were not shown to the public before The Indigo Disk was released, Bulbapedia says. - Bulbapedia says Iron Boulder cannot learn Rock Slide, which makes it the only Rock type that cannot, apart from Cornerstone Mask Ogerpon. - It is the heaviest Psychic type introduced in Generation IX. - Its 108 base Special Defense is the highest of any Rock type introduced in Generation IX. Sources: [Bulbapedia: Iron Boulder (Pokémon)](https://bulbapedia.bulbagarden.net/wiki/Iron_Boulder_(Pok%C3%A9mon)) · [Serebii: Iron Boulder (Scarlet/Violet Pokédex)](https://www.serebii.net/pokedex-sv/ironboulder/) ## Base stats - HP: **90** - Attack: **120** - Defense: **80** - Sp. Atk: **68** - Sp. Def: **108** - Speed: **124** Iron Boulder’s base stat total is **590**. Its highest stat is Speed. ## Type matchups ### What is Iron Boulder weak to? Iron Boulder takes extra damage from [Water](https://pokee.si/types/water) (2×), [Grass](https://pokee.si/types/grass) (2×), [Ground](https://pokee.si/types/ground) (2×), [Bug](https://pokee.si/types/bug) (2×), [Ghost](https://pokee.si/types/ghost) (2×), [Dark](https://pokee.si/types/dark) (2×), [Steel](https://pokee.si/types/steel) (2×) moves. It resists [Normal](https://pokee.si/types/normal) (½×), [Fire](https://pokee.si/types/fire) (½×), [Poison](https://pokee.si/types/poison) (½×), [Flying](https://pokee.si/types/flying) (½×), [Psychic](https://pokee.si/types/psychic) (½×). ## Evolution Iron Boulder does not evolve, and it does not evolve from any other Pokémon. ## Abilities - [Quark Drive](https://pokee.si/abilities/quark-drive): Raises highest stat on Electric Terrain, or if holding Booster Energy. ## Moves ### Moves Iron Boulder learns by level up in Scarlet / Violet | Level | Move | Type | Category | Power | | --- | --- | --- | --- | --- | | 1 | [Horn Attack](https://pokee.si/moves/horn-attack) | Normal | Physical | 65 | | 1 | [Leer](https://pokee.si/moves/leer) | Normal | Status | — | | 1 | [Rock Throw](https://pokee.si/moves/rock-throw) | Rock | Physical | 50 | | 1 | [Electric Terrain](https://pokee.si/moves/electric-terrain) | Electric | Status | — | | 7 | [Quick Attack](https://pokee.si/moves/quick-attack) | Normal | Physical | 40 | | 14 | [Slash](https://pokee.si/moves/slash) | Normal | Physical | 70 | | 21 | [Agility](https://pokee.si/moves/agility) | Psychic | Status | — | | 28 | [Psycho Cut](https://pokee.si/moves/psycho-cut) | Psychic | Physical | 70 | | 35 | [Counter](https://pokee.si/moves/counter) | Fighting | Physical | — | | 42 | [Rock Tomb](https://pokee.si/moves/rock-tomb) | Rock | Physical | 60 | | 49 | [Sacred Sword](https://pokee.si/moves/sacred-sword) | Fighting | Physical | 90 | | 56 | [Mighty Cleave](https://pokee.si/moves/mighty-cleave) | Rock | Physical | 95 | | 63 | [Swords Dance](https://pokee.si/moves/swords-dance) | Normal | Status | — | | 70 | [Megahorn](https://pokee.si/moves/megahorn) | Bug | Physical | 120 | | 77 | [Quick Guard](https://pokee.si/moves/quick-guard) | Fighting | Status | — | | 84 | [Stone Edge](https://pokee.si/moves/stone-edge) | Rock | Physical | 100 | | 91 | [Giga Impact](https://pokee.si/moves/giga-impact) | Normal | Physical | 150 | ### TM moves (38) Iron Boulder can learn 38 moves from TMs in Scarlet / Violet: [Take Down](https://pokee.si/moves/take-down), [Agility](https://pokee.si/moves/agility), [Scary Face](https://pokee.si/moves/scary-face), [Protect](https://pokee.si/moves/protect), [Facade](https://pokee.si/moves/facade), [Aerial Ace](https://pokee.si/moves/aerial-ace), [Bulldoze](https://pokee.si/moves/bulldoze), [Rock Tomb](https://pokee.si/moves/rock-tomb), [Endure](https://pokee.si/moves/endure), [Sandstorm](https://pokee.si/moves/sandstorm), [Psyshock](https://pokee.si/moves/psyshock), [Brick Break](https://pokee.si/moves/brick-break), [Zen Headbutt](https://pokee.si/moves/zen-headbutt), [Air Slash](https://pokee.si/moves/air-slash), [Body Slam](https://pokee.si/moves/body-slam), [Sleep Talk](https://pokee.si/moves/sleep-talk), [Rock Blast](https://pokee.si/moves/rock-blast), [Poison Jab](https://pokee.si/moves/poison-jab), [Rest](https://pokee.si/moves/rest), [Taunt](https://pokee.si/moves/taunt), [Swords Dance](https://pokee.si/moves/swords-dance), [Iron Head](https://pokee.si/moves/iron-head), [Substitute](https://pokee.si/moves/substitute), [Iron Defense](https://pokee.si/moves/iron-defense), [X-Scissor](https://pokee.si/moves/x-scissor), [Psychic](https://pokee.si/moves/psychic), [Electric Terrain](https://pokee.si/moves/electric-terrain), [Wild Charge](https://pokee.si/moves/wild-charge), [Earthquake](https://pokee.si/moves/earthquake), [Stone Edge](https://pokee.si/moves/stone-edge), [Giga Impact](https://pokee.si/moves/giga-impact), [Hyper Beam](https://pokee.si/moves/hyper-beam), [Close Combat](https://pokee.si/moves/close-combat), [Tera Blast](https://pokee.si/moves/tera-blast), [Solar Blade](https://pokee.si/moves/solar-blade), [Double-Edge](https://pokee.si/moves/double-edge), [Meteor Beam](https://pokee.si/moves/meteor-beam), [Throat Chop](https://pokee.si/moves/throat-chop). ## Breeding & training - Gender: genderless. - Egg groups: Undiscovered. - Egg cycles: 50 (steps to hatch, Scarlet/Violet: 6,400). - Catch rate: 10 out of 255. - Base friendship (Gen 8 onward): 0. - Growth rate: Slow (1,250,000 experience points to reach level 100). - Defeating it gives 3 Speed effort values. - Base experience yield: 295. ## Pokédex entries It was named after a mysterious object recorded in an old book. Its body seems to be metallic. *(Violet)* It resembles a Pokémon described in a dubious magazine as a Terrakion that had been modified by an evil organization. *(Scarlet)* ## Names around the world - **Japanese**: テツノイワオ - **Romaji**: Tetsunoiwao - **French**: Roc-de-Fer - **German**: Eisenfels - **Spanish**: Ferromole - **Italian**: Massoferreo - **Korean**: 무쇠암석 - **Chinese (Simplified)**: 铁磐岩 - **Chinese (Traditional)**: 鐵磐岩 ## Trivia - Heaviest Psychic type in Gen 9: 162.5 kg. - Fastest Psychic type in Gen 9: 124 Speed. - Highest base stat total among Psychic types in Gen 9: 590, shared with 2 others. - Fastest Rock type in Gen 9: 124 Speed. - Highest Sp. Def among Rock types in Gen 9: 108. - Highest base stat total among Rock types in Gen 9: 590. - Taller than 72% of all Pokémon (1.5 m). - Heavier than 90% of all Pokémon (162.5 kg). - Base stat total 590, ranked #61 of 1,025. - Its best stat is Speed, ranked #30 of 1,025. - One of 3 Pokémon that are both Rock and Psychic. - One of 107 gray Pokémon. - Number 117 of 120 Pokémon introduced in Generation 9 (Paldea). - Can learn 49 different moves in Scarlet / Violet. - Catch rate 10: about 1.3% per Poké Ball at full health. - Appears in 2 distinct Pokédex entries. ## Sources and fact-checking - Stats, types, abilities, moves, evolutions, forms and Pokédex entries: [PokéAPI](https://pokeapi.co) open game data. - Lore: written by pokee.si in our own words, researched from [Bulbapedia: Iron Boulder (Pokémon)](https://bulbapedia.bulbagarden.net/wiki/Iron_Boulder_(Pok%C3%A9mon)), [Serebii: Iron Boulder (Scarlet/Violet Pokédex)](https://www.serebii.net/pokedex-sv/ironboulder/). - Pronunciation (EYE-ern BOHL-der): no English source says it out loud, so it is our best guess from the parts of the name. **Last checked:** 20 October 2026. Every sentence of the lore was checked against Bulbapedia, Serebii and the game data. ## Explore [Rock-type Pokémon](https://pokee.si/types/rock) · [Psychic-type Pokémon](https://pokee.si/types/psychic) · [Rock/Psychic weaknesses and matchups](https://pokee.si/types/psychic-rock) · [Iron Boulder vs Terrakion](https://pokee.si/vs/terrakion-vs-iron-boulder) · [Paldea region guide](https://pokee.si/guide/regions/paldea) · [Quark Drive ability](https://pokee.si/abilities/quark-drive) · [Compare Iron Boulder](https://pokee.si/compare?ids=1022) · [Full Pokédex](https://pokee.si/pokedex) · [Type chart](https://pokee.si/types) · [All moves](https://pokee.si/moves) ## Browse similar Pokémon [Gen 9 Rock-type Pokémon](https://pokee.si/types/rock/gen-9) · [Gen 9 Psychic-type Pokémon](https://pokee.si/types/psychic/gen-9) · [Gen 9 Pokémon list](https://pokee.si/pokedex/gen-9) · [Gray Pokémon list](https://pokee.si/colours/gray) · [No Eggs Discovered egg group](https://pokee.si/egg-groups/undiscovered) · [Pokémon that start with I](https://pokee.si/pokemon-names/i) · [Cow and Bull Pokémon](https://pokee.si/animals/cow) ← [Raging Bolt](https://pokee.si/pokemon/raging-bolt) | [Iron Crown](https://pokee.si/pokemon/iron-crown) → --- Source: https://pokee.si/pokemon/iron-boulder (HTML page). pokee.si is an unofficial fan site and is not affiliated with Nintendo, Creatures, GAME FREAK or The Pokémon Company. Pokémon and all related names and images are © their respective owners.