
| Id | 423 |
| Type | waterground |
| Species | Sea Slug Pokémon |
| Height | 0.9 m |
| Weight | 29.9 kg |
| Abilities | Sticky Hold, Storm Drain Hidden Ability: Sand Force |
| Local Ids | 61 (Diamond/Pearl) 61 (Platinum) 261 (Sun/Moon — Alola dex) 342 (U.Sun/U.Moon — Alola dex) 231 (Sword/Shield) 61 (Brilliant Diamond/Shining Pearl) |
| Catch rate | 75 |
| Base Friendship | 50 (normal) |
| Base Exp | 166 |
| Growth Rate | Medium Fast |
| Egg Groups | Amorphous, Water 1 |
| Gender | 50% male, 50% female |
| Egg cycles | 20 (4,884–5,140 steps) |
| HP | 111 | |
| Attack | 83 | |
| Defense | 68 | |
| Sp. Atk | 92 | |
| Sp. Def | 82 | |
| Speed | 39 | |
| Total | 475 |
| Level | Move | Type | Category | Power | Accuracy |
|---|---|---|---|---|---|
| 1 | Harden | normal | status | 0 | — |
| 1 | Mud-Slap | ground | special | 20 | 100 |
| 1 | Recover | normal | status | 0 | — |
| 1 | Water Gun | water | special | 40 | 100 |
| 15 | Water Pulse | water | special | 60 | 100 |
| 20 | Ancient Power | rock | special | 60 | 100 |
| 25 | Body Slam | normal | physical | 85 | 100 |
| 33 | Muddy Water | water | special | 90 | 85 |
| 39 | Earth Power | ground | special | 90 | 100 |
| 46 | Rain Dance | water | status | 0 | — |
| 53 | Memento | dark | status | 0 | 100 |
Gastrodon does not learn any moves from evolution.
| Move | Type | Category | Power | Accuracy |
|---|---|---|---|---|
| Acid Armor | poison | status | 0 | — |
| Amnesia | psychic | status | 0 | — |
| Clear Smog | poison | special | 50 | — |
| Counter | fighting | physical | 0 | 100 |
| Curse | ghost | status | 0 | — |
| Fissure | ground | physical | 0 | 30 |
| Memento | dark | status | 0 | 100 |
| Mirror Coat | psychic | special | 0 | 100 |
| Mist | ice | status | 0 | — |
| Sludge | poison | special | 65 | 100 |
| Spit Up | normal | special | 0 | 100 |
| Stockpile | normal | status | 0 | — |
| Swallow | normal | status | 0 | — |
| Yawn | normal | status | 0 | — |
Gastrodon can not have any move tutor moves.
| TM | Move | Type | Category | Power | Accuracy |
|---|---|---|---|---|---|
| 3 | Water Pulse | water | special | 60 | 100 |
| 7 | Hail | ice | status | 0 | — |
| 13 | Ice Beam | ice | special | 90 | 100 |
| 14 | Blizzard | ice | special | 110 | 70 |
| 15 | Hyper Beam | normal | special | 150 | 90 |
| 17 | Protect | normal | status | 0 | — |
| 18 | Rain Dance | water | status | 0 | — |
| 26 | Earthquake | ground | physical | 100 | 100 |
| 28 | Dig | ground | physical | 80 | 100 |
| 32 | Double Team | normal | status | 0 | — |
| 36 | Sludge Bomb | poison | special | 90 | 100 |
| 37 | Sandstorm | rock | status | 0 | — |
| 39 | Rock Tomb | rock | physical | 60 | 95 |
| 42 | Facade | normal | physical | 70 | 100 |
| 44 | Rest | psychic | status | 0 | — |
| 45 | Attract | normal | status | 0 | 100 |
| 49 | Scald | water | special | 80 | 100 |
| 55 | Brine | water | special | 65 | 100 |
| 58 | Endure | normal | status | 0 | — |
| 68 | Giga Impact | normal | physical | 150 | 90 |
| 70 | Flash | normal | status | 0 | 100 |
| 71 | Stone Edge | rock | physical | 100 | 80 |
| 80 | Rock Slide | rock | physical | 75 | 90 |
| 82 | Sleep Talk | normal | status | 0 | — |
| 83 | Bulldoze | ground | physical | 60 | 100 |
| 87 | Swagger | normal | status | 0 | 85 |
| 90 | Substitute | normal | status | 0 | — |
| 95 | Surf | water | special | 90 | 100 |
| 96 | Strength | normal | physical | 80 | 100 |
| 98 | Rock Smash | fighting | physical | 40 | 100 |
| 99 | Waterfall | water | physical | 80 | 100 |
Gastrodon can not get any moves from trs.
| English | Gastrodon |
|---|---|
| Spanish | Gastrodon |
| Italian | Gastrodon |
| Japanese | トリトドン (Tritodon) |
| German | Gastrodon |
| French | Tritosor |
| Diamond Pearl | Route 218, Route 221, Route 222, Route 224, Route 230, Fuego Ironworks |
|---|---|
| Platinum | Route 205, Route 212, Route 213, Route 218, Route 224, Canalave City, Fuego Ironworks, Pastoria City, Valley Windworks |
| HeartGold SoulSilver | Trade/migrate from another game |
| Black White Black 2 White 2 | Trade/migrate from another game |
| X Y | Trade/migrate from another game |
| Omega Ruby Alpha Sapphire | Shellos |
| Sun Moon | Poni Wilds, Ancient Poni Path, Exeggutor Island |
| Ultra Sun Ultra Moon | Poni Wilds, Ancient Poni Path, Poni Breaker Coast, Exeggutor Island |
| Let's Go Pikachu Let's Go Eevee | Not available in this game |
| Sword Shield | Route 9 |
| Brilliant Diamond Shining Pearl | Route 218, Route 221, Route 222, Route 224, Route 230, Fuego Ironworks, Fountainspring Cave |