Kerosion
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 Shrimpgiri, Strawberry Cake and Sausage, Keromb'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 |  12 |
| 25 | 88 | 150 | 56 | 35 | 60 |
| 50 | 167 | 160 | 105 | 67 | 110 |
| 75 | 246 | 170 | 154 | 99 | 160 |
| 99 | 321 | 179 | 201 | 130 | 208 |
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
 Fireball | 1 |  Fire | 60 | 5 |
 Explosion | 5 | Fire | 100 | 15 |
 Burn | 12 | Fire | 85 | 15 |
 Quick Feet | 14 |  Normal | — | 5 |
 Blaze | 20 | Fire | 80 | 10 |
 Tackle | 23 | Normal | 50 | 15 |
 Pummel | 27 | Normal | 80 | 15 |
 Sunshine | 29 | Fire | — | 15 |
 Fire Cross | 34 | Fire | 70 | 20 |
 Pyro Bomb | 37 | Fire | 35 | 10 |
 Snake Eyes | 41 | Normal | — | 10 |
 Fire Claw | 47 | Fire | 95 | 15 |
 Fire Will | 49 | Fire | — | 10 |
 Battle Roar | 56 | Normal | — | 10 |
 Fire Stigma | 58 | Fire | 70 | 10 |
 Suncore | 62 | Fire | 110 | 15 |
Encounter locations
| Beach Wilds 8 Palmaya | 3.4% | |
| Grunda's Tomb Floor 1 Extra West Grunda's Chasm or Lateria | 4% | |
| Grunda's Tomb Floor 1 North Extra Grunda's Chasm or Lateria | 3.4% | |
| Grunda's Tomb Floor 3 Lobby Grunda's Chasm or Lateria | 3.6% | |
| Magma Grotto South 4 The City of Ignitia | 4.4% | |
| Magma Grotto South 5 The City of Ignitia | 4.2% | |
| Magma Grotto South Cavern The City of Ignitia | 7.1% |
- Favourite foods
- Other
- Evolves from
History
Changes to this nexomon across game updates.
- Other languages +科若思恩
- On the map
- +Updated
- Other languages +Querosión+Керожен
- Stats by level
- −1 · 13 · 120 · 8 · 4 · 12
- −25 · 88 · 130 · 56 · 35 · 60
- −50 · 167 · 140 · 105 · 67 · 110
- −75 · 246 · 150 · 154 · 99 · 160
- −99 · 321 · 159 · 201 · 130 · 208
- +1 · 13 · 140 · 8 · 4 · 12
- +25 · 88 · 150 · 56 · 35 · 60
- +50 · 167 · 160 · 105 · 67 · 110
- +75 · 246 · 170 · 154 · 99 · 160
- +99 · 321 · 179 · 201 · 130 · 208
- Tier changed from 2 to 3
- On the map
Other languages: KerosionQuerosiónКероженケロジョン케로시온科若思恩