Gastrodon
#423 in the Omega Ruby and Alpha Sapphire Pokédex • Sea Slug Pokémon
Omega Ruby
When its natural enemy attacks, it oozes purple fluid and escapes.
Alpha Sapphire
It apparently had a huge shell for protection in ancient times. It lives in shallow tidal pools.
Pokédexes
Egg Group
Steps to Hatch
Effort Values Yielded
Gender Ratio
Capture Rate
Base Experience
| Pokémon | Requires | Evolution |
|---|---|---|
![]() Shellos #422 | Level 30 | ![]() Gastrodon #423 |

Normal

Shiny
Gastrodon
Sea Slug Pokémon


HP
111
Attack
83
Defense
68
Sp. Atk
92
Sp. Def
82
Speed
39
Total
475
Type Chart
Weaknesses
Takes 4× from

Resistances
Takes 0× from

Takes 0.5× from




| Class | Description | ||||||
|---|---|---|---|---|---|---|---|
| Start | Harden | ![]() | Status | - | - | 30 | The user stiffens all the muscles in its body to raise its Defense stat. |
| Start | Mud-Slap | ![]() | Special | 20 | 100 | 10 | The user hurls mud in the target’s face to inflict damage and lower its accuracy. |
| Start | Mud Sport | ![]() | Status | - | - | 15 | The user covers itself with mud. This weakens Electric-type moves for five turns. |
| Start | Water Pulse | ![]() | Special | 60 | 100 | 20 | The user attacks the target with a pulsing blast of water. This may also confuse the target. |
| 2 | Mud Sport | ![]() | Status | - | - | 15 | The user covers itself with mud. This weakens Electric-type moves for five turns. |
| 4 | Harden | ![]() | Status | - | - | 30 | The user stiffens all the muscles in its body to raise its Defense stat. |
| 7 | Water Pulse | ![]() | Special | 60 | 100 | 20 | The user attacks the target with a pulsing blast of water. This may also confuse the target. |
| 11 | Mud Bomb | ![]() | Special | 65 | 85 | 10 | The user launches a hard-packed mud ball to attack. This may also lower the target’s accuracy. |
| 16 | Hidden Power | ![]() | Special | 60 | 100 | 15 | A unique attack that varies in type depending on the Pokémon using it. |
| 22 | Rain Dance | ![]() | Status | - | - | 5 | The user summons a heavy rain that falls for five turns, powering up Water-type moves. |
| 29 | Body Slam | ![]() | Physical | 85 | 100 | 15 | The user drops onto the target with its full body weight. This may also leave the target with paralysis. |
| 41 | Muddy Water | ![]() | Special | 90 | 85 | 10 | The user attacks by shooting muddy water at the opposing Pokémon. This may also lower their accuracy. |
| 54 | Recover | ![]() | Status | - | - | 5 | Restoring its own cells, the user restores its own HP by half of its max HP. |
| Class | Description | ||||||
|---|---|---|---|---|---|---|---|
| HM03 | Surf | ![]() | Special | 90 | 100 | 15 | The user attacks everything around it by swamping its surroundings with a giant wave. This can also be used for crossing water. |
| HM04 | Strength | ![]() | Physical | 80 | 100 | 15 | The target is slugged with a punch thrown at maximum power. This can also be used to move heavy boulders. |
| HM05 | Waterfall | ![]() | Physical | 80 | 100 | 15 | The user charges at the target and may make it flinch. This can also be used to climb a waterfall. |
| HM06 | Rock Smash | ![]() | Physical | 40 | 100 | 15 | The user attacks with a punch. This may also lower the target’s Defense stat. This move can also shatter rocks in the field. |
| HM07 | Dive | ![]() | Physical | 80 | 100 | 10 | Diving on the first turn, the user floats up and attacks on the next turn. It can be used to dive deep in the ocean. |
| TM06 | Toxic | ![]() | Status | - | 90 | 10 | A move that leaves the target badly poisoned. Its poison damage worsens every turn. |
| TM07 | Hail | ![]() | Status | - | - | 10 | The user summons a hailstorm lasting five turns. It damages all Pokémon except the Ice type. |
| TM10 | Hidden Power | ![]() | Special | 60 | 100 | 15 | A unique attack that varies in type depending on the Pokémon using it. |
| TM13 | Ice Beam | ![]() | Special | 90 | 100 | 10 | The target is struck with an icy-cold beam of energy. This may also leave the target frozen. |
| TM14 | Blizzard | ![]() | Special | 110 | 70 | 5 | A howling blizzard is summoned to strike opposing Pokémon. This may also leave the opposing Pokémon frozen. |
| TM15 | Hyper Beam | ![]() | Special | 150 | 90 | 5 | The target is attacked with a powerful beam. The user can’t move on the next turn. |
| TM17 | Protect | ![]() | Status | - | - | 10 | Enables the user to evade all attacks. Its chance of failing rises if it is used in succession. |
| TM18 | Rain Dance | ![]() | Status | - | - | 5 | The user summons a heavy rain that falls for five turns, powering up Water-type moves. |
| TM21 | Frustration | ![]() | Physical | - | 100 | 20 | A full-power attack that grows more powerful the less the user likes its Trainer. |
| TM26 | Earthquake | ![]() | Physical | 100 | 100 | 10 | The user sets off an earthquake that strikes every Pokémon around it. |
| TM27 | Return | ![]() | Physical | - | 100 | 20 | A full-power attack that grows more powerful the more the user likes its Trainer. |
| TM28 | Dig | ![]() | Physical | 80 | 100 | 10 | The user burrows, then attacks on the next turn. It can also be used to exit dungeons. |
| TM32 | Double Team | ![]() | Status | - | - | 15 | By moving rapidly, the user makes illusory copies of itself to raise its evasiveness. |
| TM34 | Sludge Wave | ![]() | Special | 95 | 100 | 10 | The user strikes everything around it by swamping the area with a giant sludge wave. This may also poison those hit. |
| TM36 | Sludge Bomb | ![]() | Special | 90 | 100 | 10 | Unsanitary sludge is hurled at the target. This may also poison the target. |
| TM37 | Sandstorm | ![]() | Status | - | - | 10 | A five-turn sandstorm is summoned to hurt all combatants except the Rock, Ground, and Steel types. |
| TM39 | Rock Tomb | ![]() | Physical | 60 | 95 | 15 | Boulders are hurled at the target. This also lowers the target’s Speed stat by preventing its movement. |
| TM42 | Facade | ![]() | Physical | 70 | 100 | 20 | An attack move that doubles its power if the user is poisoned, burned, or has paralysis. |
| TM44 | Rest | ![]() | Status | - | - | 5 | The user goes to sleep for two turns. This fully restores the user’s HP and heals any status conditions. |
| TM45 | Attract | ![]() | Status | - | 100 | 15 | If it is the opposite gender of the user, the target becomes infatuated and less likely to attack. |
| TM48 | Round | ![]() | Special | 60 | 100 | 15 | The user attacks the target with a song. Others can join in the Round and make the attack do greater damage. |
| TM55 | Scald | ![]() | Special | 80 | 100 | 15 | The user shoots boiling hot water at its target. This may also leave the target with a burn. |
| TM68 | Giga Impact | ![]() | Physical | 150 | 90 | 5 | The user charges at the target using every bit of its power. The user can’t move on the next turn. |
| TM70 | Flash | ![]() | Status | - | 100 | 20 | The user flashes a bright light that cuts the target’s accuracy. It can also be used to illuminate dark caves. |
| TM71 | Stone Edge | ![]() | Physical | 100 | 80 | 5 | The user stabs the target with sharpened stones from below. Critical hits land more easily. |
| TM78 | Bulldoze | ![]() | Physical | 60 | 100 | 20 | The user strikes everything around it by stomping down on the ground. This lowers the Speed stat of those hit. |
| TM80 | Rock Slide | ![]() | Physical | 75 | 90 | 10 | Large boulders are hurled at the opposing Pokémon to inflict damage. This may also make the opposing Pokémon flinch. |
| TM83 | Infestation | ![]() | Special | 20 | 100 | 20 | The target is infested and attacked for four to five turns. The target can’t flee during this time. |
| TM87 | Swagger | ![]() | Status | - | 90 | 15 | The user enrages and confuses the target. However, this also sharply raises the target’s Attack stat. |
| TM88 | Sleep Talk | ![]() | Status | - | - | 10 | While it is asleep, the user randomly uses one of the moves it knows. |
| TM90 | Substitute | ![]() | Status | - | - | 10 | The user makes a copy of itself using some of its HP. The copy serves as the user’s decoy. |
| TM94 | Secret Power | ![]() | Physical | 70 | 100 | 20 | An attack whose additional effects depend upon where it was used. Can also be used to make a Secret Base. |
| TM100 | Confide | ![]() | Status | - | - | 20 | The user tells the target a secret, and the target loses its ability to concentrate. This lowers the target’s Sp. Atk stat. |
| Class | Description | |||||
|---|---|---|---|---|---|---|
| Block | ![]() | Status | - | - | 5 | The user blocks the target’s way with arms spread wide to prevent escape. |
| Earth Power | ![]() | Special | 90 | 100 | 10 | The user makes the ground under the target erupt with power. This may also lower the target’s Sp. Def. |
| Icy Wind | ![]() | Special | 55 | 95 | 15 | The user attacks with a gust of chilled air. This also lowers the opposing Pokémon’s Speed stats. |
| Pain Split | ![]() | Status | - | - | 20 | The user adds its HP to the target’s HP, then equally shares the combined HP with the target. |
| Snore | ![]() | Special | 50 | 100 | 15 | An attack that can be used only if the user is asleep. The harsh noise may also make the target flinch. |
| Water Pulse | ![]() | Special | 60 | 100 | 20 | The user attacks the target with a pulsing blast of water. This may also confuse the target. |
Sticky Hold
Ability Slot 1
Protects the Pokémon from item theft.
Prevents a held item from being removed by other Pokémon.
Storm Drain
Ability Slot 2
Draws in all Water-type moves to boost its Sp. Atk stat.
Redirects single-target Water moves to this Pokémon where possible. Absorbs Water moves, raising Special Attack one stage.
Sand Force
Hidden Ability
Boosts certain moves’ power in a sandstorm.
Strengthens Rock, Ground, and Steel moves to 1.3× their power during a sandstorm. Protects against sandstorm damage.





















Status
Special
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