Vulnerabilities are imposed debuffs on bosses in Cookie Run: Kingdom.
In some game modes like Special Episodes, Boss Hunt or Tropical Raids, the bosses have irremovable vulnerability debuffs. If the boss has vulnerability to certain elements, it will take extra elemental damage from those elements. If the boss has a vulnerability to certain debuffs, they will have a Rage meter and a Fatigue meter.
The Rage meter gradually fills during the battle. Once full, the boss will temporarily gain certain stat buffs such as 
ATK Up or 
Frenzy, and may perform a specific skill.
The Fatigue meter fills up every time the boss is inflicted with either debilitating debuffs or debuffs that they're vulnerable to, filling up based on the strength of the debuff. Once full, they'll temporarily enter a state of Weakening, which 
Stuns the boss and increases the damage they receive, as well as emptying out their Rage meter. Cookies can only add to a boss's Fatigue meter once per regular attack or skill attack, and only add half the amount if they only inflict a debilitating debuff that the boss is not vulnerable to.
List of Vulnerabilities[]
| Vulnerability | Effective Cookies & Treasures | |
|---|---|---|
|
Fire | See Fire |
|
Poison | See Poison |
|
Light | See Light |
|
Water | See Water |
|
Earth | See Earth |
|
Electricity | See Electricity |
|
Darkness | See Darkness |
|
All Elements | See Element |
|
Taunted |       
|
|
Stun |                       
|
|
Shackles |      
|
|
Charm |   
|
|
Silence |     
|
|
Freeze |   
|
|
Light Cage | 
|
|
Sleep |  
|
|
Polymorph |
|
|
Injury |  
|
|
Healing Debuffs |      
|
|
Frost |  
|
|
Zap |       
|
|
Vampiric Bite | 
|
|
Weakness |    
|
Notes[]
Blossoming Acorn Bomb excludes bosses when applying its effect, hence it is ineffective to bosses that are Vulnerable to Polymorph.
