Gastrodon
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/Soulsilver

When its natural enemy attacks, it oozes purple fluid and escapes.

Evolution Chain

shellos
Shellos
Level 30
gastrodon
Gastrodon

Pokédex & Training Data

Classification Sea Slug Pokémon
Height 0.9 m (2'11")
Weight 29.9 kg (65.9 lbs)
EV Yield +2 hp
Catch Rate 75
Base Friendship 70
Growth Rate medium
Gender Ratio
♂ ♀
Egg Groups Water1, Indeterminate

Pokédex Numbers

Sinnoh (D/P) #061
Sinnoh (Plat.) #061
Alola (S/M) #261
Alola (US/UM) #342
Galar (Sw/Sh) #231
Hisui #083
Paldea (S/V) #328
National #423

Game Locations

Canalave City Area
Fuego Ironworks Area
Pastoria City Area
Sinnoh Route 205 South Towards Floaroma Town
Sinnoh Route 212 East Towards Pastoria City
Sinnoh Route 213 Area
Sinnoh Route 218 Area
Sinnoh Route 221 Area
Sinnoh Route 222 Area
Sinnoh Route 224 Area
Sinnoh Sea Route 230 Area
Valley Windworks Area

Learned Moves

Level Up Moves

Diamond/Pearl
Lvl Name Class Power Acc. PP Effect
1 Harden
— — 30 Raises the user’s Defense by one stage.
1 Mud Slap
20 100% 10 Has a 100% chance to lower the target’s accuracy by one stage.
1 Mud Sport
— — 15 Halves all Electric-type damage.
1 Water Pulse
60 100% 20 Has a 20% chance to confuse the target.
2 Mud Sport
— — 15 Halves all Electric-type damage.
4 Harden
— — 30 Raises the user’s Defense by one stage.
7 Water Pulse
60 100% 20 Has a 20% chance to confuse the target.
11 Mud Bomb
65 85% 10 Has a 30% chance to lower the target’s accuracy by one stage.
16 Hidden Power
60 100% 15 Power and type depend upon user’s IVs. Power can range from 30 to 70.
22 Rain Dance
— — 5 Changes the weather to rain for five turns.
29 Body Slam
85 100% 15 Has a 30% chance to paralyze the target.
41 Muddy Water
90 85% 10 Has a 30% chance to lower the target’s accuracy by one stage.
54 Recover
— — 5 Heals the user by half its max HP.
Platinum
Lvl Name Class Power Acc. PP Effect
1 Harden
— — 30 Raises the user’s Defense by one stage.
1 Mud Slap
20 100% 10 Has a 100% chance to lower the target’s accuracy by one stage.
1 Mud Sport
— — 15 Halves all Electric-type damage.
1 Water Pulse
60 100% 20 Has a 20% chance to confuse the target.
2 Mud Sport
— — 15 Halves all Electric-type damage.
4 Harden
— — 30 Raises the user’s Defense by one stage.
7 Water Pulse
60 100% 20 Has a 20% chance to confuse the target.
11 Mud Bomb
65 85% 10 Has a 30% chance to lower the target’s accuracy by one stage.
16 Hidden Power
60 100% 15 Power and type depend upon user’s IVs. Power can range from 30 to 70.
22 Rain Dance
— — 5 Changes the weather to rain for five turns.
29 Body Slam
85 100% 15 Has a 30% chance to paralyze the target.
41 Muddy Water
90 85% 10 Has a 30% chance to lower the target’s accuracy by one stage.
54 Recover
— — 5 Heals the user by half its max HP.
HeartGold/SoulSilver
Lvl Name Class Power Acc. PP Effect
1 Harden
— — 30 Raises the user’s Defense by one stage.
1 Mud Slap
20 100% 10 Has a 100% chance to lower the target’s accuracy by one stage.
1 Mud Sport
— — 15 Halves all Electric-type damage.
1 Water Pulse
60 100% 20 Has a 20% chance to confuse the target.
2 Mud Sport
— — 15 Halves all Electric-type damage.
4 Harden
— — 30 Raises the user’s Defense by one stage.
7 Water Pulse
60 100% 20 Has a 20% chance to confuse the target.
11 Mud Bomb
65 85% 10 Has a 30% chance to lower the target’s accuracy by one stage.
16 Hidden Power
60 100% 15 Power and type depend upon user’s IVs. Power can range from 30 to 70.
22 Rain Dance
— — 5 Changes the weather to rain for five turns.
29 Body Slam
85 100% 15 Has a 30% chance to paralyze the target.
41 Muddy Water
90 85% 10 Has a 30% chance to lower the target’s accuracy by one stage.
54 Recover
— — 5 Heals the user by half its max HP.

TM/HM Moves

Diamond/PearlPlatinum
Name Class Power Acc. PP Effect
HM03 Surf
90 100% 15 Inflicts regular damage and can hit Dive users.
HM04 Strength
80 100% 15 Inflicts regular damage with no additional effect.
HM06 Rock Smash
40 100% 15 Has a 50% chance to lower the target’s Defense by one stage.
HM07 Waterfall
80 100% 15 Has a 20% chance to make the target flinch.
TM03 Water Pulse
60 100% 20 Has a 20% chance to confuse the target.
TM06 Toxic
— 90% 10 Badly poisons the target, inflicting more damage every turn.
TM07 Hail
— — 10 Changes the weather to a hailstorm for five turns.
TM10 Hidden Power
60 100% 15 Power and type depend upon user’s IVs. Power can range from 30 to 70.
TM13 Ice Beam
90 100% 10 Has a 10% chance to freeze the target.
TM14 Blizzard
110 70% 5 Has a 10% chance to freeze the target.
TM15 Hyper Beam
150 90% 5 User foregoes its next turn to recharge.
TM17 Protect
— — 10 Prevents any moves from hitting the user this turn.
TM18 Rain Dance
— — 5 Changes the weather to rain for five turns.
TM21 Frustration
— 100% 20 Power increases as happiness decreases, up to a maximum of 102.
TM26 Earthquake
100 100% 10 Inflicts regular damage and can hit Dig users.
TM27 Return
— 100% 20 Power increases with happiness, up to a maximum of 102.
TM28 Dig
80 100% 10 User digs underground, dodging all attacks, and hits next turn.
TM32 Double Team
— — 15 Raises the user’s evasion by one stage.
TM36 Sludge Bomb
90 100% 10 Has a 30% chance to poison the target.
TM37 Sandstorm
— — 10 Changes the weather to a sandstorm for five turns.
TM39 Rock Tomb
60 95% 15 Has a 100% chance to lower the target’s Speed by one stage.
TM42 Facade
70 100% 20 Power doubles if user is burned, paralyzed, or poisoned.
TM43 Secret Power
70 100% 20 Has a 30% chance to inflict a status effect which depends upon the terrain.
TM44 Rest
— — 5 User sleeps for two turns, completely healing itself.
TM45 Attract
— 100% 15 Target falls in love if it has the opposite gender, and has a 50% chance to refuse attacking the user.
TM55 Brine
65 100% 10 Has double power against Pokémon that have less than half their max HP remaining.
TM58 Endure
— — 10 Prevents the user’s HP from lowering below 1 this turn.
TM68 Giga Impact
150 90% 5 User foregoes its next turn to recharge.
TM70 Flash
— 100% 20 Lowers the target’s accuracy by one stage.
TM71 Stone Edge
100 80% 5 Has an increased chance for a critical hit.
TM78 Captivate
— 100% 20 Lowers the target’s Special Attack by two stages if it’s the opposite gender.
TM80 Rock Slide
75 90% 10 Has a 30% chance to make the target flinch.
TM82 Sleep Talk
— — 10 Randomly uses one of the user’s other three moves. Only works if the user is sleeping.
TM83 Natural Gift
— 100% 15 Power and type depend on the held berry.
TM87 Swagger
— 85% 15 Raises the target’s Attack by two stages and confuses the target.
TM90 Substitute
— — 10 Transfers 1/4 of the user’s max HP into a doll, protecting the user from further damage or status changes until it breaks.
HeartGold/SoulSilver
Name Class Power Acc. PP Effect
HM03 Surf
90 100% 15 Inflicts regular damage and can hit Dive users.
HM04 Strength
80 100% 15 Inflicts regular damage with no additional effect.
HM05 Whirlpool
35 85% 15 Prevents the target from leaving battle and inflicts 1/16 its max HP in damage for 2-5 turns.
HM06 Rock Smash
40 100% 15 Has a 50% chance to lower the target’s Defense by one stage.
HM07 Waterfall
80 100% 15 Has a 20% chance to make the target flinch.
TM03 Water Pulse
60 100% 20 Has a 20% chance to confuse the target.
TM06 Toxic
— 90% 10 Badly poisons the target, inflicting more damage every turn.
TM07 Hail
— — 10 Changes the weather to a hailstorm for five turns.
TM10 Hidden Power
60 100% 15 Power and type depend upon user’s IVs. Power can range from 30 to 70.
TM13 Ice Beam
90 100% 10 Has a 10% chance to freeze the target.
TM14 Blizzard
110 70% 5 Has a 10% chance to freeze the target.
TM15 Hyper Beam
150 90% 5 User foregoes its next turn to recharge.
TM17 Protect
— — 10 Prevents any moves from hitting the user this turn.
TM18 Rain Dance
— — 5 Changes the weather to rain for five turns.
TM21 Frustration
— 100% 20 Power increases as happiness decreases, up to a maximum of 102.
TM26 Earthquake
100 100% 10 Inflicts regular damage and can hit Dig users.
TM27 Return
— 100% 20 Power increases with happiness, up to a maximum of 102.
TM28 Dig
80 100% 10 User digs underground, dodging all attacks, and hits next turn.
TM32 Double Team
— — 15 Raises the user’s evasion by one stage.
TM36 Sludge Bomb
90 100% 10 Has a 30% chance to poison the target.
TM37 Sandstorm
— — 10 Changes the weather to a sandstorm for five turns.
TM39 Rock Tomb
60 95% 15 Has a 100% chance to lower the target’s Speed by one stage.
TM42 Facade
70 100% 20 Power doubles if user is burned, paralyzed, or poisoned.
TM43 Secret Power
70 100% 20 Has a 30% chance to inflict a status effect which depends upon the terrain.
TM44 Rest
— — 5 User sleeps for two turns, completely healing itself.
TM45 Attract
— 100% 15 Target falls in love if it has the opposite gender, and has a 50% chance to refuse attacking the user.
TM55 Brine
65 100% 10 Has double power against Pokémon that have less than half their max HP remaining.
TM58 Endure
— — 10 Prevents the user’s HP from lowering below 1 this turn.
TM68 Giga Impact
150 90% 5 User foregoes its next turn to recharge.
TM70 Flash
— 100% 20 Lowers the target’s accuracy by one stage.
TM71 Stone Edge
100 80% 5 Has an increased chance for a critical hit.
TM78 Captivate
— 100% 20 Lowers the target’s Special Attack by two stages if it’s the opposite gender.
TM80 Rock Slide
75 90% 10 Has a 30% chance to make the target flinch.
TM82 Sleep Talk
— — 10 Randomly uses one of the user’s other three moves. Only works if the user is sleeping.
TM83 Natural Gift
— 100% 15 Power and type depend on the held berry.
TM87 Swagger
— 85% 15 Raises the target’s Attack by two stages and confuses the target.
TM90 Substitute
— — 10 Transfers 1/4 of the user’s max HP into a doll, protecting the user from further damage or status changes until it breaks.

Tutor Moves

Platinum
Name Class Power Acc. PP Effect
Ancient Power
60 100% 5 Has a 10% chance to raise all of the user’s stats by one stage.
Dive
80 100% 10 User dives underwater, dodging all attacks, and hits next turn.
Earth Power
90 100% 10 Has a 10% chance to lower the target’s Special Defense by one stage.
Icy Wind
55 95% 15 Has a 100% chance to lower the target’s Speed by one stage.
Mud Slap
20 100% 10 Has a 100% chance to lower the target’s accuracy by one stage.
Snore
50 100% 15 Has a 30% chance to make the target flinch. Only works if the user is sleeping.
HeartGold/SoulSilver
Name Class Power Acc. PP Effect
Ancient Power
60 100% 5 Has a 10% chance to raise all of the user’s stats by one stage.
Block
— — 5 Prevents the target from leaving battle.
Dive
80 100% 10 User dives underwater, dodging all attacks, and hits next turn.
Earth Power
90 100% 10 Has a 10% chance to lower the target’s Special Defense by one stage.
Headbutt
70 100% 15 Has a 30% chance to make the target flinch.
Icy Wind
55 95% 15 Has a 100% chance to lower the target’s Speed by one stage.
Mud Slap
20 100% 10 Has a 100% chance to lower the target’s accuracy by one stage.
Pain Split
— — 20 Sets the user’s and targets’s HP to the average of their current HP.
Snore
50 100% 15 Has a 30% chance to make the target flinch. Only works if the user is sleeping.
String Shot
— 95% 40 Lowers the target’s Speed by two stages.

Base Stats

Hp 111
Attack 83
Defense 68
Sp. Atk 92
Sp. Def 82
Speed 39
Total 475

Type Defenses

(vs. Gen 6+ rules)

0.5x
4x
0x
0.5x
0.5x
0.5x