#0411 · Sinnoh · Generation 4 · fossil

Bastiodon

Shield Pokémon · Rock/Steel-type

Bastiodon is a Rock/Steel-type Pokémon, the Shield Pokémon, number 411 (#0411) in the National Pokédex. It was introduced in Generation 4 and comes from the Sinnoh region. It is 1.3 m tall and weighs 149.5 kg.

Bastiodon wears a castle wall for a face. The Pokédex says that when a herd lines up side by side, nothing can break through, which is how they shielded their young; its one flaw is that it is helpless from behind.

How to pronounce Bastiodon

Bastiodon is pronounced BAS-tee-oh-don. The capital letters show the stressed syllable.

Listen to Bastiodon said out loud:

In Japanese it is トリデプス (Torideps).

Hear every other name on the Pokémon pronunciation guide.

Lore

Biology

Bastiodon is a dark grey, ceratopsian-like Pokémon whose square head carries four cream-yellow, window-like spots and four blunt tusks along the lower jaw. It is 1.3 m tall and weighs 149.5 kg. The Pokédex compares its face to diamond in one entry and steel in another, and says the facial bones are so large and hard that researchers mistook them for a spine until a Bastiodon was successfully restored.

Behaviour

Despite its rough look, Bastiodon is a docile, caring herd animal. Its fossils are often found alongside those of Rampardos, and the Pokédex says they seem to have fought to the finish.

Habitat

The Legends: Arceus entry admits its natural habitat is still unknown. In Scarlet and Violet it appears in 4 star Tera Raid Battles in The Indigo Disk, can be made by evolving Shieldon in Violet, and is otherwise a trade.

Diet

The Pokédex says it feeds on grass and berries.

Powers

Its Abilities are Sturdy and, hidden, Soundproof. It learns Metal Burst at level 43, Iron Head at 51 and Heavy Slam at 58. With base Special Defense 138 and only 30 Speed, it is built to absorb hits rather than dodge them.

Name origin

Bastiodon may combine 'bastion' and -don, the ending of many dinosaur names, from the Greek for 'tooth'; it may also allude to the Bastille. The Japanese name is Torideps (トリデプス), possibly from 砦 toride ('fortress') and Triceratops or -ops.

Design inspiration

Bulbapedia sees a ceratopsian dinosaur, with a head like Chasmosaurus. The bony shield looks like a castle wall, and with its mouth shut the horns and tusks line up like a portcullis, the gate of a fortress.

Evolution notes

Shieldon becomes Bastiodon at level 30, and Bastiodon learns Block as it evolves.

In the games

Bastiodon is the signature Pokémon of Canalave Gym Leader Byron, introduced in Diamond and Pearl, where his team ends with it. At the Pokémon World Tournament in Black 2 and White 2, Byron always leads with it. It appears in space-time distortions in Legends: Arceus and is not available in Legends: Z-A.

In the anime

Byron's Bastiodon debuted in 'Ancient Family Matters!', where its battle with Roark's Rampardos was cut short by Team Rocket. In 'Dealing With Defensive Types!' it beat Ash's Chimchar, then lost to Gliscor.

Fun facts

• Bulbapedia says the castle wall in Pokémon Battle Revolution's Courtyard Colosseum resembles a Bastiodon's head.
• Its base Defense of 168 is the highest of any Generation IV Pokémon.
• In Pokémon Masters EX, Byron forms a sync pair with his Bastiodon.

Sources: Bulbapedia: Bastiodon (Pokémon) · Serebii: Bastiodon (Scarlet/Violet Pokédex)

Base stats

• HP: 60
• Attack: 52
• Defense: 168
• Sp. Atk: 47
• Sp. Def: 138
• Speed: 30

Bastiodon’s base stat total is 495. Its highest stat is Defense.

Type matchups

What is Bastiodon weak to?

Bastiodon takes extra damage from Fighting (4×), Ground (4×), Water (2×) moves.

It resists Normal (¼×), Flying (¼×), Ice (½×), Psychic (½×), Bug (½×), Rock (½×), Dragon (½×), Fairy (½×).

It is immune to Poison moves.

Evolution

What does Bastiodon evolve from?

Bastiodon evolves from Shieldon at level 30.

Bastiodon is the final stage of its evolution family.

The whole family: Shieldon, Bastiodon.

Abilities

• Sturdy: Prevents being KOed from full HP, leaving 1 HP instead. Protects against the one-hit KO moves regardless of HP.
• Soundproof (hidden ability): Protects against sound-based moves.

Moves

Moves Bastiodon learns by level up in Scarlet / Violet

“Evo” means Bastiodon learns the move the moment it evolves: Block.

TM moves (55)

Bastiodon can learn 55 moves from TMs in Scarlet / Violet: Take Down, Mud-Slap, Scary Face, Protect, Trailblaze, Facade, Bulldoze, Rock Tomb, Avalanche, Endure, Sunny Day, Rain Dance, Sandstorm, Dig, Foul Play, Body Slam, Sleep Talk, Reflect, Rock Blast, Stomping Tantrum, Rest, Rock Slide, Taunt, Body Press, Flash Cannon, Iron Head, Power Gem, Substitute, Iron Defense, Stealth Rock, Heavy Slam, Flamethrower, Thunderbolt, Earth Power, Reversal, Ice Beam, Fire Blast, Blizzard, Earthquake, Stone Edge, Giga Impact, Outrage, Hyper Beam, Thunder, Steel Beam, Tera Blast, Roar, Sand Tomb, Smack Down, Double-Edge, Scorching Sands, Meteor Beam, Metal Sound, Curse, Hard Press.

Egg moves (7):Counter, Fissure, Focus Energy, Guard Split, Headbutt, Screech, Wide Guard.

Breeding & training

• Gender: 87.5% male, 12.5% female.
• Egg groups: Monster.
• Egg cycles: 30 (steps to hatch, Scarlet/Violet: 3,840).
• Catch rate: 45 out of 255.
• Base friendship (Gen 8 onward): 50.
• Growth rate: Slow Then Very Fast (600,000 experience points to reach level 100).
• Defeating it gives 2 Defense effort values.
• Base experience yield: 173.

Pokédex entries

Its face is sturdy—as strong as diamond—and this hardness offers a very stable defense. Much about this species is still unknown, such as its natural habitat. (Legends: Arceus)

This Pokémon is from roughly 100 million years ago. Its terrifyingly tough face is harder than steel. (Ultra Moon)

The bones of its face are huge and hard, so they were mistaken for its spine until after this Pokémon was successfully restored. (Ultra Sun)

It lived in the same environments as Rampardos. Their fossils have been found together— seemingly from after they'd fought to the finish. (Moon)

While it can guard against any sort of attack from the front, it is left without recourse when attacked from behind. (Sun)

Any frontal attack is repulsed. It is a docile Pokémon that feeds on grass and berries. (Diamond, Y, Alpha Sapphire)

Names around the world

Trivia

• Highest Defense among Gen 4 Pokémon: 168.
• Highest Defense among Rock types in Gen 4: 168.
• Highest Defense among Steel types in Gen 4: 168.
• Taller than 64% of all Pokémon (1.3 m).
• Heavier than 88% of all Pokémon (149.5 kg).
• Base stat total 495, ranked #317 of 1,025.
• Its best stat is Defense, ranked #8 of 1,025.
• One of 7 Pokémon that are both Rock and Steel.
• One of 107 gray Pokémon.
• Number 25 of 107 Pokémon introduced in Generation 4 (Sinnoh).
• Part of an evolution family of 2 Pokémon.
• Can learn 67 different moves in Scarlet / Violet.
• Catch rate 45: about 5.9% per Poké Ball at full health.
• Appears in 9 distinct Pokédex entries.

Sources and fact-checking

• Stats, types, abilities, moves, evolutions, forms and Pokédex entries: PokéAPI open game data.
• Lore: written by pokee.si in our own words, researched from Bulbapedia: Bastiodon (Pokémon), Serebii: Bastiodon (Scarlet/Violet Pokédex).
• Pronunciation (BAS-tee-oh-don): it follows how the English anime, games or official videos say it.

Last checked: 20 October 2026. Every sentence of the lore was checked against Bulbapedia, Serebii and the game data.

Explore

Rock-type Pokémon · Steel-type Pokémon · Rock/Steel weaknesses and matchups · Sinnoh region guide · Sturdy ability · Soundproof ability · Compare Bastiodon · Full Pokédex · Type chart · All moves

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Gen 4 Rock-type Pokémon · Gen 4 Steel-type Pokémon · Gen 4 Pokémon list · Gray Pokémon list · Monster egg group · Pokémon that start with B · Dinosaur Pokémon

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