Pokémon GO · #139 · Rock / Water
Omastar in Pokémon GO
Omastar (#139) is a Rock / Water-type Pokémon. In Pokémon GO its max CP is 3,150 at level 50, 2,786 at level 40 and 3,188 as a best buddy at level 51. Its highest-damage moveset is Rock Throw with Hydro Pump (needs an Elite TM). It takes extra damage from Grass, Electric, Fighting and Ground attacks.
| Type | Rock / Water |
|---|---|
| Pokédex number | #139 |
| Base Attack / Defense / Stamina | 207 / 201 / 172 |
| Max CP, level 40 / 50 / 51 | 2,786 / 3,150 / 3,188 |
| Max HP, level 50 | 157 |
| Buddy distance | 5 km per Candy |
| Second Charged Attack | 75,000 Stardust and 75 Candy |
| Height / weight | 1 m / 35 kg |
Omastar evolution
Pokémon GO has no evolution levels: a Pokémon evolves when you spend Candy on it (sometimes with an item or a task), at any level.
Omastar evolves from Omanyte for 50 Omanyte Candy.
Omastar is the last stage of its family: it does not evolve further.
Family: Omanyte · Omastar
Omastar CP by level
Combat Power with perfect stats (15/15/15) and with 10/10/10. Players find that raid, egg and research catches never have a stat below 10; that floor is their measurement, not a number in the game data.
| Level | CP 15/15/15 | CP 10/10/10 | HP 15/15/15 | Note |
|---|---|---|---|---|
| 15 | 1,194 | 1,138 | 96 | research rewards are at most level 15 (game master) |
| 20 | 1,592 | 1,517 | 111 | eggs hatch at most level 20 (game master); raid catches are level 20 (players’ measurement) |
| 25 | 1,990 | 1,897 | 124 | raid catches in weather that boosts the boss’s type are level 25 (players’ measurement) |
| 30 | 2,388 | 2,276 | 136 | wild Pokémon are at most level 30 (game master) |
| 35 | 2,587 | 2,466 | 142 | |
| 40 | 2,786 | 2,655 | 147 | |
| 45 | 2,965 | 2,826 | 152 | |
| 50 | 3,150 | 3,002 | 157 | |
| 51 | 3,188 | 3,038 | 158 | best buddy bonus on a level 50 Pokémon |
Omastar best moveset
Ranked by damage per second over one cycle of fast attacks and one charged attack. Assumptions: Omastar at level 40 with 15/15/15, a target with 180 Defense taking neutral damage, no weather boost, and the energy Omastar gains from being hit left out.
| Fast attack | Charged attack | Damage per second | |
|---|---|---|---|
| Rock Throw | Hydro Pump | 11.1 | Elite TM |
| Rock Throw | Rock Slide | 10.5 | Elite TM |
| Water Gun | Hydro Pump | 10.3 | |
| Rock Throw | Rock Blast | 10.0 | Elite TM |
| Water Gun | Rock Slide | 9.9 | Elite TM |
Fast attacks
| Move | Type | Power | Energy | Time | Power / s | |
|---|---|---|---|---|---|---|
| Mud Shot | Ground | 4 | 6 | 0.5 s | 8.0 | |
| Rock Throw | Rock | 13 | 8 | 1 s | 13.0 | same type, ×1.2, Elite TM |
| Water Gun | Water | 5 | 5 | 0.5 s | 10.0 | same type, ×1.2 |
Charged attacks
| Move | Type | Power | Energy cost | Time | Power / s | |
|---|---|---|---|---|---|---|
| Ancient Power | Rock | 70 | 33 | 3.5 s | 20.0 | same type, ×1.2 |
| Hydro Pump | Water | 135 | 100 | 3.5 s | 38.6 | same type, ×1.2 |
| Rock Blast | Rock | 50 | 33 | 2 s | 25.0 | same type, ×1.2 |
| Rock Slide | Rock | 75 | 50 | 2.5 s | 30.0 | same type, ×1.2, Elite TM |
Omastar weaknesses and resistances
Damage multipliers for each attack type against Rock / Water. Pokémon GO uses ×1.6 for super effective and ×0.625 for not very effective, multiplied for two types.
| Attack type | Damage |
|---|---|
| Grass | ×2.56 |
| Electric | ×1.6 |
| Fighting | ×1.6 |
| Ground | ×1.6 |
| Fire | ×0.39 |
| Flying | ×0.625 |
| Ice | ×0.625 |
| Normal | ×0.625 |
| Poison | ×0.625 |
Omastar CP calculator
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Sources: stats, moves, evolution costs and the CP multiplier for each level are from the Pokémon GO game master as published by PokeMiners (commit 8e227be, data of 28 August 2026). Which Pokémon are in the game: pogoapi.net (list of 31 January 2026). CP = ⌊(Attack+IV) × √(Defense+IV) × √(Stamina+IV) × CPM² / 10⌋, checked against pogoapi.net’s max CP table for 888 Pokémon. Raid catch levels and the 10/10/10 floor are players’ measurements; they are not in the game data. Pokémon and Pokémon GO are trademarks of their owners; this page is not affiliated with or endorsed by Niantic, Scopely, Nintendo, Creatures, GAME FREAK or The Pokémon Company.