Main Pokédex page | Flavor text and images
General
Abilities
- Swift Swim
- This Pokémon's Speed doubles during Rain Dance.
- Shell Armor
- No moves will critically hit this Pokémon.
Dex Numbers
- Generation
RBY
Kanto- 139
Johto- 221
Hoenn- n/a
Sinnoh- n/a
Names
- Japanese
- オムスター
- Romaji
- Omusutaa
Flavor
- Height
- 3'3.4" or 1 m
- Weight
- 77.2 lb or 35 kg
- Species
- Spiral
- Color
- blue
- Cry
- mp3 here
Habitat
- Pawprint

Misc
- R/B/Y code
- 99 or 0x63
Breeding
- Gender
⅞ male; ⅛ female (code: 31 or 0x1f)- Breeding groups
-
2: Water 1
9: Water 3 - Steps to hatch
- 7,680
- Compatible with
- 40 families; 90 total Pokémon
In the Wild
- Base EXP
- 199 or 0xc7
- Capture rate
- 45 or 0x2d
- Base happiness
- 70 or 0x46
- Growth rate
- medium
- Effort points
- 2 Defense
- Wild held items
- n/a
Evolution Chain
Comparison of this evolution chain
| Basic | Stage 1 |
|---|---|
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Stats
| Stat | Base | Max Stat | %ile | |
|---|---|---|---|---|
| L50 | L100 | |||
| HP | 177 | 344 | 56.2 | |
| Attack | 112 | 219 | 31.2 | |
| Defense | 177 | 349 | 94.5 | |
| Special Attack | 167 | 329 | 93.1 | |
| Special Defense | 122 | 239 | 53.1 | |
| Speed | 107 | 209 | 36.7 | |
| Average | - | - | 73.4 | |
Flavor
All versions' flavor text and sprites
It is thought that this Pokémon became extinct because its spiral shell grew too large.
Locations
Sorry, Pearl players! Only Diamond for the moment.
| Area | Section | Level | Method |
|---|
Move List
Omastar's Special Attack is higher, so it will inflict more damage with special (
) moves.
Omastar gets the STAB from
and
moves.
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Move | Type | Dmg | PP | Power | Acc.* | Pri. | Description | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| -- | Bite | ![]() |
|
25 | 60 | 100% | Has a 30% chance to make the target Flinch. | ||||||
| -- | -- | -- | -- | Constrict | ![]() |
|
35 | 10 | 100% | Has a 10% chance to lower the target's Speed. | |||
| -- | Horn Attack | ![]() |
|
25 | 65 | 100% | Inflicts regular damage. | ||||||
| -- | -- | -- | -- | -- | Withdraw | ![]() |
|
40 | -- | 100% | Raises the user's Defense. | ||
| -- | -- | -- | 7 | Bite | ![]() |
|
25 | 60 | 100% | Has a 30% chance to make the target Flinch. | |||
| -- | -- | -- | 10 | Water Gun | ![]() |
|
25 | 40 | 100% | Inflicts regular damage. | |||
| 13 | 13 | Bite | ![]() |
|
25 | 60 | 100% | Has a 30% chance to make the target Flinch. | |||||
| 16 | Rollout | ![]() |
|
20 | 30 | 90% | Power doubles every turn this move is used in succession after the first, resetting after five turns. | ||||||
| -- | -- | 19 | Leer | ![]() |
|
30 | -- | 100% | Lowers the target's Defense. | ||||
| 19 | 19 | Water Gun | ![]() |
|
25 | 40 | 100% | Inflicts regular damage. | |||||
| 25 | 25 | 25 | Mud Shot | ![]() |
|
15 | 55 | 95% | Has a 100% chance to lower the target's Speed. | ||||
| 28 | Brine | ![]() |
|
10 | 65 | 100% | Inflicts double damage against Pokemon that have less than half their max HP remaining. | ||||||
| 31 | 31 | Leer | ![]() |
|
30 | -- | 100% | Lowers the target's Defense. | |||||
| -- | 37 | 37 | 34 | Protect | ![]() |
|
10 | -- | 0% | 3 | Goes first. Prevents any moves from hitting the user this turn. | ||
| 37 | AncientPower | ![]() |
|
5 | 60 | 100% | Has a 10% chance to raise all of the user's stats. | ||||||
| 44 | 40 | 40 | 40 | 40 | Spike Cannon | ![]() |
|
15 | 20 | 100% | Hits 2-5 times in one turn. | ||
| 46 | 46 | 48 | Tickle | ![]() |
|
20 | -- | 100% | Lowers the target's Attack and Defense. | ||||
| 54 | 55 | 55 | AncientPower | ![]() |
|
5 | 60 | 100% | Has a 10% chance to raise all of the user's stats. | ||||
| 56 | Rock Blast | ![]() |
|
10 | 25 | 80% | Hits 2-5 times in one turn. | ||||||
| 49 | 65 | 65 | 65 | 67 | Hydro Pump | ![]() |
|
5 | 120 | 80% | Inflicts regular damage. | ||
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![]() | Tutored moves | ||||||||
| |
Body Slam | ![]() |
|
15 | 85 | 100% | Has a 30% chance to Paralyze the target. | |||||
| |
Double-Edge | ![]() |
|
15 | 120 | 100% | User receives 1/3 the damage inflicted in recoil. | |||||
|
Ice Beam | ![]() |
|
10 | 95 | 100% | Has a 10% chance to Freeze the target. | ||||||
| |
Seismic Toss | ![]() |
|
20 | varies | 100% | Inflicts damage equal to the user's level. | |||||
| |
Mimic | ![]() |
|
10 | -- | 100% | Copies the target's last used move. | |||||
| |
Rock Slide | ![]() |
|
10 | 75 | 90% | Has a 30% chance to make the target Flinch. | |||||
| |
Substitute | ![]() |
|
10 | -- | 100% | Transfers 1/4 of the user's max HP into a doll, protecting the user from further damage or status changes until it breaks. | |||||
| Snore | ![]() |
|
15 | 40 | 100% | Has a 30% chance to make the target Flinch. Only works if the user is Sleeping. | ||||||
|
Snore | ![]() |
|
15 | 40 | 100% | Has a 30% chance to make the target Flinch. Only works if the user is Sleeping. | ||||||
|
Mud-Slap | ![]() |
|
10 | 20 | 100% | Has a 100% chance to lower the target's Accuracy. | ||||||
| Icy Wind | ![]() |
|
15 | 55 | 95% | Has a 100% chance to lower the target's Speed. | ||||||
|
Icy Wind | ![]() |
|
15 | 55 | 95% | Has a 100% chance to lower the target's Speed. | ||||||
| Endure | ![]() |
|
10 | -- | 100% | 3 | Goes first. Prevents the user's HP from lowering below 1 this turn. | |||||
| Rollout | ![]() |
|
20 | 30 | 90% | Power doubles every turn this move is used in succession after the first, resetting after five turns. | ||||||
| Swagger | ![]() |
|
15 | -- | 90% | Raises the target's Attack by two levels and Confuses the target. | ||||||
| Sleep Talk | ![]() |
|
10 | -- | 100% | Randomly uses one of the user's other three moves. Only works if the user is Sleeping. | ||||||
|
AncientPower | ![]() |
|
5 | 60 | 100% | Has a 10% chance to raise all of the user's stats. | ||||||
|
Knock Off | ![]() |
|
20 | 20 | 100% | Target drops its held item. | ||||||
|
Dive | ![]() |
|
10 | 80 | 100% | User dives underwater, dodging all attacks, and hits next turn. | ||||||
|
Iron Defense | ![]() |
|
15 | -- | 100% | Raises the user's Defense by two levels. | ||||||
|
Earth Power | ![]() |
|
10 | 90 | 100% | Has a 10% chance to lower the target's Special Defense. | ||||||
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![]() | TMs and HMs | ||||||||
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45 | 45 | 45 | 45 | Attract | ![]() |
|
15 | -- | 100% | Target falls in love if it has the opposite gender, and has a 50% chance to refuse attacking the user. | ||
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34 | Bide | ![]() |
|
10 | varies | 100% | 1 | Goes first. User waits for 2-3 turns, then inflicts typeless damage equal to twice the HP it lost while waiting. | ||||
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14 | 14 | 14 | 14 | 14 | Blizzard | ![]() |
|
5 | 120 | 70% | Has a 10% chance to Freeze the target. Chance to hit becomes 100% during Hail. | |
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08 | Body Slam | ![]() |
|
15 | 85 | 100% | Has a 30% chance to Paralyze the target. | |||||
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55 | Brine | ![]() |
|
10 | 65 | 100% | Inflicts double damage against Pokemon that have less than half their max HP remaining. | |||||
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11 | BubbleBeam | ![]() |
|
20 | 65 | 100% | Has a 10% chance to lower the target's Speed. | |||||
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78 | Captivate | ![]() |
|
20 | -- | 100% | Lowers the target's Special Attack by two levels if it is the opposite gender. | |||||
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03 | Curse | ![]() |
|
10 | -- | 100% | Ghosts pay half their max HP to hurt the target every turn. Others decrease Speed but raise Attack and Defense. | |||||
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H8 | H8 | Dive | ![]() |
|
10 | 80 | 100% | User dives underwater, dodging all attacks, and hits next turn. | ||||
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32 | 32 | 32 | 32 | 32 | Double Team | ![]() |
|
15 | -- | 100% | Raises the user's Evasion. | |
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10 | Double-Edge | ![]() |
|
15 | 120 | 100% | User receives 1/3 the damage inflicted in recoil. | |||||
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20 | 58 | Endure | ![]() |
|
10 | -- | 100% | 3 | Goes first. Prevents the user's HP from lowering below 1 this turn. | |||
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42 | 42 | 42 | Facade | ![]() |
|
20 | 70 | 100% | Power doubles if user is Burned, Paralyzed, or Poisoned. | |||
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21 | 21 | 21 | 21 | Frustration | ![]() |
|
20 | varies | 100% | Power increases as Happiness decreases, up to a maximum of 102. | ||
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68 | Giga Impact | ![]() |
|
5 | 150 | 90% | User foregoes its next turn to recharge. | |||||
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74 | Gyro Ball | ![]() |
|
5 | varies | 100% | Inflicts more damage when the user has lower Speed, with a maximum of 150 power. | |||||
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07 | 07 | 07 | Hail | ![]() |
|
10 | -- | 100% | Changes the weather to a hailstorm for five turns. | |||
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02 | Headbutt | ![]() |
|
15 | 70 | 100% | Has a 30% chance to make the target Flinch. | |||||
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10 | 10 | 10 | 10 | Hidden Power | ![]() |
|
15 | varies | 100% | Power and type depend upon user's IVs. Power can range from 30 to 70. | ||
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07 | Horn Drill | ![]() |
|
5 | varies | 30% | Causes a one-hit KO. | |||||
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15 | 15 | 15 | 15 | 15 | Hyper Beam | ![]() |
|
5 | 150 | 90% | User foregoes its next turn to recharge. | |
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13 | 13 | 13 | 13 | Ice Beam | ![]() |
|
10 | 95 | 100% | Has a 10% chance to Freeze the target. | ||
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16 | Icy Wind | ![]() |
|
15 | 55 | 95% | Has a 100% chance to lower the target's Speed. | |||||
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31 | Mimic | ![]() |
|
10 | -- | 100% | Copies the target's last used move. | |||||
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83 | Natural Gift | ![]() |
|
15 | varies | 100% | Power and type depend on the held berry. | |||||
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17 | 17 | 17 | 17 | Protect | ![]() |
|
10 | -- | 0% | 3 | Goes first. Prevents any moves from hitting the user this turn. | |
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20 | Rage | ![]() |
|
20 | 20 | 100% | User can only use this move until it wins or faints, but becomes stronger each time it is hit. | |||||
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18 | 18 | 18 | 18 | Rain Dance | ![]() |
|
5 | -- | 0% | Changes the weather to rain for five turns. | ||
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33 | Reflect | ![]() |
|
20 | -- | 100% | Reduces damage from physical attacks by 50%. | |||||
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44 | 44 | 44 | 44 | 44 | Rest | ![]() |
|
10 | -- | 100% | User Sleeps, completely healing itself. | |
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27 | 27 | 27 | 27 | Return | ![]() |
|
20 | varies | 100% | Power increases with Happiness, up to a maximum of 102. | ||
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H8 | Rock Climb | ![]() |
|
20 | 90 | 85% | Has a 20% chance to Confuse the target. | |||||
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69 | Rock Polish | ![]() |
|
20 | -- | 0% | Raises the user's Speed by two levels. | |||||
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80 | Rock Slide | ![]() |
|
10 | 75 | 90% | Has a 30% chance to make the target Flinch. | |||||
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08 | H6 | H6 | H6 | Rock Smash | ![]() |
|
15 | 40 | 100% | Has a 50% chance to lower the target's Defense. | ||
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39 | 39 | 39 | Rock Tomb | ![]() |
|
10 | 50 | 80% | Has a 100% chance to lower the target's Speed. | |||
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04 | Rollout | ![]() |
|
20 | 30 | 90% | Power doubles every turn this move is used in succession after the first, resetting after five turns. | |||||
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37 | 37 | 37 | 37 | Sandstorm | ![]() |
|
10 | -- | 100% | Changes the weather to a sandstorm for five turns. | ||
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43 | 43 | 43 | Secret Power | ![]() |
|
20 | 70 | 100% | Has a 30% chance to inflict a status effect which depends upon the terrain. | |||
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19 | Seismic Toss | ![]() |
|
20 | varies | 100% | Inflicts damage equal to the user's level. | |||||
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40 | Skull Bash | ![]() |
|
15 | 100 | 100% | Raises the user's Defense. User charges for one turn before attacking. | |||||
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35 | 82 | Sleep Talk | ![]() |
|
10 | -- | 100% | Randomly uses one of the user's other three moves. Only works if the user is Sleeping. | ||||
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13 | Snore | ![]() |
|
15 | 40 | 100% | Has a 30% chance to make the target Flinch. Only works if the user is Sleeping. | |||||
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76 | Stealth Rock | ![]() |
|
20 | -- | 0% | Causes damage when Pokemon switch in to where the target is now. | |||||
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71 | Stone Edge | ![]() |
|
5 | 100 | 80% | Has an increased chance for a critical hit. | |||||
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17 | Submission | ![]() |
|
25 | 80 | 80% | User receives 1/4 the damage it inflicts in recoil. | |||||
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50 | 90 | Substitute | ![]() |
|
10 | -- | 100% | Transfers 1/4 of the user's max HP into a doll, protecting the user from further damage or status changes until it breaks. | ||||
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H3 | H3 | H3 | H3 | H3 | Surf | ![]() |
|
15 | 95 | 100% | Inflicts regular damage. | |
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34 | 87 | Swagger | ![]() |
|
15 | -- | 90% | Raises the target's Attack by two levels and Confuses the target. | ||||
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09 | Take Down | ![]() |
|
20 | 90 | 85% | User receives 1/4 the damage it inflicts in recoil. | |||||
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46 | 46 | 46 | 46 | Thief | ![]() |
|
10 | 40 | 100% | Takes the target's item. | ||
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06 | 06 | 06 | 06 | 06 | Toxic | ![]() |
|
10 | -- | 85% | Badly Poisons the target, inflicting more damage every turn. | |
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12 | Water Gun | ![]() |
|
25 | 40 | 100% | Inflicts regular damage. | |||||
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03 | 03 | 03 | Water Pulse | ![]() |
|
20 | 60 | 100% | Has a 20% chance to Confuse the target. | |||
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H7 | H7 | H7 | Waterfall | ![]() |
|
15 | 80 | 100% | Has a 20% chance to make the target Flinch. | |||
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H6 | Whirlpool | ![]() |
|
15 | 15 | 70% | Prevents the target from leaving battle and inflicts 1/16 its max HP in damage for 2-5 turns. | |||||
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