Shellos < Gastrodon > Ambipom
Sea Slug Pokémon
Water.gif Ground.gif
2′11″ (0.9m)
65.9 lbs. (29.9kg)
Gender Ratio
Male: 50%
Female: 50%
Evolves From
Evolves Into
Egg Group
Catch Rate
EV Yield

Gastrodon (トリトドン) is the 61st Pokémon in the Sinnoh Pokédex. It is a Water/Ground Type, and is known as the Sea Slug Pokémon.

Gastrodon can use one of two Abilities: Sticky Hold, which prevents opponents from taking its Held Item; or Storm Drain, which draws Water-Type moves to it, nullifying any damage that would have been done to it and increasing its Special Attack by one stage. Its Hidden Ability is Sand Force, which grants a 33% Increase to Ground, Rock and Steel-Type moves during a Sandstorm.

Shellos can evolve into Gastrodon at Level 30.

Gastrodon is in the Egg Groups Water 1 and Amorphous, and its Egg takes approximately 5,120 Steps to hatch. It takes Gastrodon One Million Experience Points to reach Level 100.




Gastrodon, like Shellos, has two different forms, the East Sea and West Sea forms. The West Sea Gastrodon has a Brown back, and its underside is pink. There are several pink spots and bumps on its back, and there are two horn-like structures on its head. On the East Sea Gastrodon, its back is green with blue spots, and there are several flap-looking structures. Its underside is blue, and there are two hornlike structures on its head as well.

Gender Differences

Gastrodon has no gender differences.

Game Information

Original Games

Gastrodon can be found at Routes 213, 218, 224 and Fuego Ironworks in Diamond, Pearl and Platinum. Gastrodon also appears at Routes 221, 222 and 230 in Diamond and Pearl, and at Route 205, Route 212, Pastoria City, Canalave City and Valley Windworks in Platinum.

In Pokémon X and Y, Gastrodon can be caught in the Friend Safari. In Pokémon Sun and Moon, it can be caught at Ancient Poni Path, Exeggutor Island and Poni Wilds.

The only way to obtain a Gastrodon in Heart Gold, Soul Silver, Black 2, White 2, Omega Ruby and Alpha Sapphire is to evolve a Shellos.

Spin-Off Games

West Sea Gastrodon can be found at Brine Cave B1-B9 & DPB1, while East Sea Gastrodon appear at Craggy Coast B6-B9 and Small Path B1-B5 in Explorers of Time, Explorers of Darkness and Explorers of Sky. Gastrodon appears in all three versions of Mystery Dungeon 3, appearing at Secret Archipelago, Legendary Volcanic Island, Secret Highland, Legendary Wetland, Secret Rockmountain and Legendary Mountains. The Secret-named areas feature Gastrodon on floors 18-29, while the Legendary-named areas feature Gastrodon on floors 1-25. In both areas both forms of Gastrodon appear on different floors.

Gastrodon can be found at Marine Cave and Volcano Cave in Pokémon Ranger: Shadows of Almia. In Pokémon Ranger: Guardian Signs, Gastrodon can be found at the Hot Springs on Faldera Volcano in the Present, but Gastrodon doesn't appear in the Past Missions.

Gastrodon appears at Desolated Ruins Beach 3-1 and Sunny Seashore Beach 4-3 in Pokémon Rumble Blast.

Trading Card Game

Both forms of Gastrodon are featured in the Trading Card Game twice each, with both forms being listed as Rare Cards in the Secret Wonders and Rising Rivals sets.

Anime/Manga Information


Gastrodon has only appeared with a Trainer so far in the Anime. Cynthia would use a West Sea Gastrodon in the episodes Double Team Turnover! and Aiding the Enemy. Zoey would debut a West Sea Gastrodon of her own during the Sinnoh Festival, which had evolved from her Shellos. Paul used an East Sea Gastrodon in his Sinnoh League Battle against Ash in the first part of the battle, which occurred in the episode Familiarity Breeds Strategy!. It would give Ash's Staraptor all it could handle, but Ash made the substitution to Buizel, who managed to defeat Gastrodon.


Gastrodon has yet to appear in any of the films as of writing.


Gastrodon's Manga Information is unknown as of writing.

Pokémon Information

Competitive Battling

Gastrodon finds itself in the Neverused (NU) tier of competitive battling. With a great defensive typing that allows for it to check Pokémon like Aggron, Steelix, and Swords Dance Charizard, Gastrodon provides a lot of utility for teams. Its ability Storm Drain is great as it gives Gastrodon a nice Water immunity while being able to gain a Special Attack boost. This, along with an Electric immunity, gives it the ability to switch into both Volt Switch and Scald, while being able to check Water-types like Floatzel, Kabutops, and Lanturn. Recover is a wonderful recovery move that gives Gastrodon the ability to pivot in and out throughout the match. However, Gastrodon suffers greatly from its x4 weakness to Grass, as it is threatened by Pokémon like Lilligant and Vileplume. It also is very slow, forcing it to take a hit most of the time before doing anything else. Gastrodon is susceptible to status, which can be problematic as it can be forced to use Recover more often than it would like. As a Fire-type check, Gastrodon struggles due to Fire-types like Magmortar and Pyroar tending to carry Hidden Power Grass for Gastrodon.

Gastrodon is a viable option in the Underused (UU) tier of competitive battling. Due to its ability Storm Drain, Gastrodon can take on some of the omnipresent Water-types of the tier, such as Suicune and Swampert. Its access to reliable recovery sets it apart from other Curse users like Snorlax and Mega Swampert, and it can act as a good mixed wall of sorts with a boost under its belt. Gastrodon suffers from its inability to threaten Grass-types and its very slow Speed stat. It is also vulnerable to status ailments and lacks utility moves like Stealth Rock and Roar that Swampert possesses.

Gastrodon is also usable in the Overused (OU) tier of competitive battling. Thanks to its typing, decent bulk, Water immunity courtesy of Storm Drain, and access to Recover, Gastrodon can handle numerous threats, such as Keldeo, Thundurus, Mega Metagross lacking Grass Knot, Mega Manectric, and Swift Swim users like Kabutops and Kingdra. Gastrodon can even opt for a different approach than its typical physically defensive set with a Curse set that makes it a set-up sweeper capable of handling Calm Mind Slowbro and Suicune. Despite these unique traits, Gastrodon is not flawless, as its overall raw bulk is not outstanding, meaning that it can be overpowered by stronger physical attackers. Gastrodon does face immense competition from other bulky Ground and Water-types, but its own set of niches allows for it to not be completely outclassed.

Area Location

Game Rarity Location
Diamond/Pearl 5% Route 230
Diamond/Pearl 10% Route 221, Route 222 (Night), Route 224 (Night)
Diamond/Pearl 15% Fuego Ironworks
Diamond/Pearl 20% Route 218, Route 224
Diamond/Pearl 30% Route 222
Platinum 1% (Surfing) Route 213, Route 218, Fuego Ironworks, Pastroia City, Canalave City
Platinum 9% (Surfing) Route 205: South, Route 212: South, Valley Windworks
Platinum 10% Route 224 (Grass & Surfing)
Platinum 15% Fuego Ironworks (Morning & Day)
Platinum 25% Route 218 (Morning & Day), Fuego Ironworks (Night)
Platinum 35% Route 218
HeartGold/SoulSilver None Evolve Shellos
Black/White None PokéTransfer or Dream World
Black 2/White 2 None Evolve Shellos
X/Y -- Friend Safari
Omega Ruby/Alpha Sapphire None Evolve Shellos
Sun/Moon 10% Ancient Poni Path, Exeggutor Island, Poni Wilds
Sun/Moon 20% (Surf) Poni Wilds

Pokédex Entries

Gen Game Pokédex Entry
IV Diamond It has a pliable body without any bones. If any part of its body is torn off, it grows right back.
Pearl It apparently had a huge shell for protection in ancient times. It lives in shallow tidal pools.
Platinum Long ago, its entire back was shielded with a sturdy shell. There are traces of it left in its cells.
HeartGold When its natural enemy attacks, it oozes purple fluid and escapes.
SoulSilver When its natural enemy attacks, it oozes purple fluid and escapes.
V Black Long ago, its entire back was shielded with a sturdy shell. There are traces of it left in its cells.
White Long ago, its entire back was shielded with a sturdy shell. There are traces of it left in its cells.
Black 2 Long ago, its entire back was shielded with a sturdy shell. There are traces of it left in its cells.
White 2 Long ago, its entire back was shielded with a sturdy shell. There are traces of it left in its cells.
VI X When its natural enemy attacks, it oozes purple fluid and escapes.
Y It apparently had a huge shell for protection in ancient times. It lives in shallow tidal pools.
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.

West Sea

Gen Game Pokédex Entry
VII Sun It has strong regenerative capabilities. Even if parts of it are bitten off by fish Pokémon, it will return to normal within a few hours.
Moon Plankton, invisible to the naked eye, is its main food source. It comes onto the land periodically, but the reason for this is not known.
Ultra Sun
Ultra Moon
Let's Go, Pikachu!
Let's Go, Eevee!

East Sea

Gen Game Pokédex Entry
VII Sun A team of researchers is scouring the oceans of the world in search of a Gastrodon in a color never seen before.
Moon Experiments are being conducted to discover what happens when a Gastrodon is raised in a location other than the sea where it was born.
Ultra Sun
Ultra Moon
Let's Go, Pikachu!
Let's Go, Eevee!

Pokéthlon Statistics



Base Stats Min- Min Max Max+
. 332 426 .
153 171 265 291
126 141 235 258
Sp. Atk
170 189 283 311
Sp. Def
152 169 263 289
74 83 177 194


Via Level-Up

Level Up
Level Move Type Power Accuracy Class
Start Mud-Slap Ground.gif 20 100 Special.png
Start Mud Sport Ground.gif -- -- Other.png
Start Harden Normal.gif -- -- Other.png
Start Water Pulse Water.gif 60 100 Special.png
2 Mud Sport Ground.gif -- -- Other.png
4 Harden Normal.gif -- -- Other.png
7 Water Pulse Water.gif 60 100 Special.png
11 Mud Bomb Ground.gif 65 85 Special.png
16 Hidden Power Normal.gif 60 100 Special.png
22 Rain Dance Water.gif -- -- Other.png
29 Body Slam Normal.gif 85 100 Physical.png
41 Muddy Water Water.gif 90 85 Special.png
54 Recover Normal.gif -- -- Other.png


TM/HM - Gen 7
TM/HM No. Move Type Power Accuracy Class
TM06 Toxic Poison.gif -- 90 Other.png
TM07 Hail Ice.gif -- -- Other.png
TM10 Hidden Power Normal.gif 60 100 Special.png
TM13 Ice Beam Ice.gif 90 100 Special.png
TM14 Blizzard Ice.gif 110 70 Special.png
TM15 Hyper Beam Normal.gif 150 90 Special.png
TM17 Protect Normal.gif -- -- Other.png
TM18 Rain Dance Water.gif -- -- Other.png
TM21 Frustration Normal.gif  ?? 100 Physical.png
TM26 Earthquake Ground.gif 100 100 Physical.png
TM27 Return Normal.gif  ?? 100 Physical.png
TM32 Double Team Normal.gif -- -- Other.png
TM34 Sludge Wave Poison.gif 95 100 Special.png
TM36 Sludge Bomb Poison.gif 90 100 Special.png
TM37 Sandstorm Rock.gif -- -- Other.png
TM39 Rock Tomb Rock.gif 60 95 Physical.png
TM42 Facade Normal.gif 70 100 Physical.png
TM44 Rest Psychic.gif -- -- Other.png
TM45 Attract Normal.gif -- 100 Other.png
TM48 Round Normal.gif 60 100 Special.png
TM55 Scald Water.gif 80 100 Special.png
TM68 Giga Impact Normal.gif 150 90 Physical.png
TM71 Stone Edge Rock.gif 100 80 Physical.png
TM78 Bulldoze Ground.gif 60 100 Physical.png
TM80 Rock Slide Rock.gif 75 90 Physical.png
TM83 Infestation Bug.gif 20 100 Other.png
TM87 Swagger Normal.gif -- 85 Other.png
TM88 Sleep Talk Normal.gif -- -- Other.png
TM90 Substitute Normal.gif -- -- Other.png
TM94 Surf Water.gif 90 100 Special.png
TM98 Waterfall Water.gif 80 100 Physical.png
TM100 Confide Normal.gif -- -- Other.png

Via Breeding

Via Breeding
Move Type Power Accuracy Class
Acid Armor Poison.gif -- -- Other.png
Amnesia Psychic.gif -- -- Other.png
Brine Water.gif 65 100 Special.png
Clear Smog Poison.gif 50 -- Special.png
Counter Fighting.gif  ?? 100 Physical.png
Curse Ghost.gif -- -- Other.png
Fissure Ground.gif  ?? 30 Physical.png
Memento Dark.gif -- 100 Other.png
Mirror Coat Psychic.gif  ?? 100 Special.png
Mist Ice.gif -- -- Other.png
Sludge Poison.gif 65 100 Special.png
Spit Up Normal.gif  ?? 100 Special.png
Stockpile Normal.gif -- -- Other.png
Swallow Normal.gif -- -- Other.png
Trump Card Normal.gif  ?? -- Special.png
Yawn Normal.gif -- -- Other.png


Move Type Power Accuracy Class
Breakneck Blitz Normal.gif 200*/200* -- Physical.png Special.png
All-Out Pummeling Fighting.gif 100 -- Physical.png
Acid Downpour Poison.gif 175 -- Special.png
Tectonic Rage Ground.gif 180*/120* -- Physical.png Special.png
Continental Crush Rock.gif 180 -- Physical.png
Savage Spin-Out Bug.gif 100 -- Special.png
Hydro Vortex Water.gif 160*/175* -- Physical.png Special.png
Shattered Psyche Psychic.gif 100 -- Special.png
Subzero Slammer Ice.gif 185 -- Special.png

Transfer Only Z-Moves

Move Type Power Accuracy Class
Tectonic Rage Ground.gif 175 -- Special.png
Continental Crush Rock.gif 120 -- Special.png

Past Moves

Via Move Tutor (Black 2/White 2)

Move Type Power Accuracy Class
Block Normal.gif -- -- Other.png
Earth Power Ground.gif 90 100 Special.png
Icy Wind Ice.gif 55 95 Special.png
Pain Split Normal.gif -- -- Other.png
Sleep Talk Normal.gif -- -- Other.png
Snore Normal.gif 40 100 Special.png

Generation IV Exclusive Moves


Via Move Tutor

Platinum/Heart Gold/Soul Silver
Move Type Power Accuracy Class
Ancientpower Rock.gif 60 100 Special.png
Heart Gold/Soul Silver
Move Type Power Accuracy Class
String Shot Bug.gif -- 95 Other.png
Headbutt Normal.gif 70 100 Physical.png

Evolution Line

Rare Candy Sprite.png
Level 30

Type Matchups

Type Attack Advantages Attack Disadvantages Defense Advantages Defense Disadvantages

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Last edited by Squiggle on 21 March 2017 at 00:20
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