Ostrolt
When it appears
As a tier-3 Nexomon, it only turns up in the grass after you beat Ross and Nora in Laboratory Ruins Boss, or from the start in Custom Mode with high-tier encounters allowed.
Capturing
Its favourite foods are Grape, Watermelon and Chocolate Cake, Chirrent's, as every stage of a line shares the first one's. Feeding it one adds 15 to your capture chance, where other food adds 5. Catching a Nexomon explains how the whole chance adds up.
Evolution
Cosmic
Every wild one has a 1 in 4,000 chance to be cosmic at first, and 1 in 3,500 later in the story. What improves the odds is on the Nexomon page.
Normal 
Cosmic
Stats by level
Before cores. How stats grow is on the Nexomon page.
| 1 |  13 |  140 |  8 |  4 |  11 |
| 25 | 91 | 150 | 51 | 36 | 51 |
| 50 | 173 | 161 | 95 | 70 | 92 |
| 75 | 255 | 171 | 140 | 103 | 133 |
| 99 | 333 | 182 | 182 | 135 | 172 |
Damage taken
How hard a skill of each element hits it, going by its element. The full damage formula is on the Skills page.
Skill tree
 Pulse Storm | 1 |  Electric | 50 | 5 |
 Electric Storm | 6 | Electric | 105 | 20 |
 Thunder | 10 | Electric | 75 | 10 |
 Electric Force | 16 | Electric | 110 | 15 |
 Thunder Blast | 20 | Electric | 85 | 15 |
 Sonic Scream | 24 |  Normal | 85 | 15 |
 Drain | 25 | Electric | — | 5 |
 Electric Current | 29 | Electric | 95 | 15 |
 Plasma Star | 34 | Normal | 110 | 15 |
 Static Burst | 37 | Electric | 60 | 10 |
 Crimson Blast | 42 | Electric | — | 20 |
 Power Up | 45 | Normal | — | 10 |
 Spinning Kick | 49 | Normal | 75 | 10 |
 Blue Charge | 55 | Electric | — | 10 |
 Double Slash | 58 | Normal | 105 | 20 |
 Mirage | 65 | Electric | — | 25 |
Encounter locations
This location is a cave, meaning wild Nexomon can appear anywhere you walk.
| Beach Wilds 1 Palmaya | 3.9% | |
| Underwater City Dungeon 2 Vados's Domain | 3.9% | |
| Underwater City Dungeon 3 The City of Cadium or Vados's Domain | 4.4% | |
| Underwater City Dungeon 6 The City of Cadium | 3.9% | |
| Underwater City East Road 2 The City of Cadium | 3.7% | |
| Underwater City Engine Room 1 The City of Cadium | 4.3% | |
| Underwater City Engine Room 3 The City of Cadium | 3.9% | |
| Underwater City Road 3 The City of Cadium | 3.5% |
- Favourite foods
- Other
- Evolves from
History
Changes to this nexomon across game updates.
- Other languages +奥斯特罗特
- On the map
- +Updated
- Other languages +Острольт
- Stats by level
- −1 · 13 · 120 · 8 · 4 · 11
- −25 · 91 · 130 · 51 · 36 · 51
- −50 · 173 · 141 · 95 · 70 · 92
- −75 · 255 · 151 · 140 · 103 · 133
- −99 · 333 · 162 · 182 · 135 · 172
- +1 · 13 · 140 · 8 · 4 · 11
- +25 · 91 · 150 · 51 · 36 · 51
- +50 · 173 · 161 · 95 · 70 · 92
- +75 · 255 · 171 · 140 · 103 · 133
- +99 · 333 · 182 · 182 · 135 · 172
- Tier changed from 2 to 3
- On the map
Other languages: OstroltОстрольтオストロルト오스트롤트奥斯特罗特