|Sea Slug Pokémon|
|#423|| Sticky Hold/Storm Drain|
|2′11″ (0.9m)||65.9 lbs. (29.9kg)|
|Male: 50%||Female: 50%|
|Evolves From||Evolves Into|
|Egg Group||Catch Rate|
Gastrodon (Sinnoh Pokédex. It is a Water/Ground Type, and is known as the Sea Slug Pokémon.) is the 61st Pokémon in the
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. A third Ability is available to Gastrodon from the Dream World, the Sand Force Ability. This Ability grants a 33% Increase to Ground, Rock and Steel-Type moves during a Sandstorm.
Shellos can evolve into Gastrodon at Level 30.
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. The only way to obtain a Gastrodon in Heart Gold, Soul Silver, Black 2 and White 2 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 Rarelyused (RU) tier of competitive battling. Gastrodon is primarily used as a physical wall thanks to its great defensive typing and great ability in Storm Drain that allows it to gain a Special Attack boost if hit by a Water-type move. It also has access to reliable recovery in Recover, which is great for a defensive Pokémon. However, Gastrodon is very slow, weak to status like poison and burn, and has an exploitable weakness to Grass-type attacks.
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. Ironically, Gastrodon is more viable in this tier than the other two tiers it is viable in due to the bigger number of threats that Gastrodon can handle by itself. 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
 Pokédex Entries
 Pokéthlon Statistics
 Via Level-Up
 Via TM/HM
 Via Breeding
 Via Move Tutor (Black 2/White 2)
 Generation IV Exclusive Moves
 Via TM/HM
- TM43: Secret Power
- TM58: Endure
- TM78: Captivate
- TM83: Natural Gift
- HM05: Whirlpool (Heart Gold/Soul Silver Only)
 Via Move Tutor
 Platinum/Heart Gold/Soul Silver
 Heart Gold/Soul Silver
 Evolution Line
 Type Matchups
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