Treasure is a Stage Reward which may be obtained upon clearing one of the main story stages. Each stage has a Treasure named after a memento from the location, though standard icons are used instead of images. Each Treasure exists in up to 3 tiers, which are called Inferior, Normal, and Superior  their icons are bronze, silver, and gold respectively.
Completing a regional collection of Treasures gives the player permanent upgrades to many aspects of the game, some of which do not have a counterpart in the XPpurchasable upgrades. Examples include increased cat health or attack power. The effect of the boost depends on the quality of the various treasures in that collection.
Obtaining Treasure
Treasure randomly drops after clearing each of the main story stages, and a small popup will indicate that a treasure is obtained at the end of stage result screen. It is possible for any tier of treasure to drop. Note that if a player already has a Treasure from that stage, the game will not award a similar Treasure of lower or equal tier. Players would often have to repeatedly clear a stage until they obtain the Superior treasure.
The drop rate for Treasures appears to vary depending on the stage. For example, the first stage of Empire of Cats, Korea, always guarantees a Superior treasure during the tutorial, while the seventh stage of Empire of Cats Chapter 1 has a high (but not 100%) chance of a Superior treasure. Using a Treasure Radar item will also guarantee a Superior treasure upon victory. Certain events can also increase the drop rate by an unspecified amount.
The medals treasure from Zombie Outbreaks are different which given as clearance reward instead. Thus the player may be able to obtain the said stage Treasure at same time with the zombie outbreak clear medal.
Checking treasures obtained
Once the player has obtained a treasure from a stage, an icon corresponding to the Treasure tier will appear beside the stage name. The name of the Treasure can also be found in the collections screen.The stage selection screen shows stages from which treasures have already been obtained  note the gold treasure icons beside the stage names which mean that the player has obtained the Superior treasures.
Players can check the Treasures they have obtained along with the Treasure effects by following the instructions in the images below.
List of treasures and effects
See Main Chapters Levels page
Treasure mechanism
The bonus from any set of Treasures is activated upon completion of the set. The total effect is shown as a percentage of the maximum possible. Each treasure contributes to the percentage based on its tier. Inferior gives a small effect, Normal gives a moderate effect, while Superior gives the greatest effect to the power of the collection. To fully achieve the set effect, the player needs to obtain all the Superior Treasures in the collection, which is when the percentage reaches 100%. However, this does not necessarily imply that the effect of the set is to increase the particular stat by 100%. The Treasure bonus is carried over all playthrough, is permanent for each player, and stacks additively with other effects.
The formula for the percentage activation:
Percentage activation=(sum of treasure values)/(3*number of treasures to activate)  Where treasure value for bronze, silver, gold is 1, 2, 3 respectively. ex:Energy Drink needs 7 treasures to activate, if you have 4 bronze, 1 silver, 2 gold. Then percent of activate is: (1*4+2*1+3*2)/(3*7)=57.14%
Cat Base Health increase
 Refer to the Smart Material Wall treasure.
The treasure collection which increases the base health will give +7000 base health for every 100% treasure set with base health upgrade effect. If you have 3 treasure sets with same effect on 100% then the result is +21000 base health.
Health and Attack Power increase
 Refer to the Legendary Cat Shield and Legendary Cat Sword.
Each Cat has different base values for their Health and their Attack Power called an Initial Stat.
When a player gets the 100%, 200% or 300% effect of the Cat Shield Treasure (Health) and/or the Cat Sword Treasure (Attack Power), the corresponding Initial Stat (Health or Attack Power) of the cat will then increase by 150%, 200% or 250%.
This applies to the Initial Stat independently of the growth rate calculation which is used to determine a cat's health and damage based on their current level.
The general formula for a Cat's Health or Attack Power at a given level, below the first level reduction point, is:
Stats at level n = Initial Stat + (n1)*(Initial Stat/5)
^{multiply the value above by 1.5, 2.0 or 2.5 at 100%, 200% or 300% Treasure Bonus. Use this formula when level n < m , less than the first reduction point (see below)}
Cat Treasure effects increase a Cat's Initial Health or Attack Power as indicated.
An Initial Health Stat of 100 for a level 1 Cat boosted by 100%, 200% or 300% treasure bonuses would thus become 150, 200 or 250 Health at level 1.
All cats have their own initial Health and Initial Damage Stat.
a simple example, Cat's Health at level 1 through to level 8 would be affected as shown below 
0% Cat Shield  100% Cat Shield  200% Cat Shield  300% Cat Shield  

Level 1  100 initial stat  150 initial stat  200 initial stat  250 initial stat 
Level 2  120  180  240  300 
Level 3  140  210  280  350 
Level 4  160  240  320  400 
Level 5  180  270  360  450 
Level 6  200  300  400  500 
Level 7  220  330  440  550 
Level 8  240  360  480  600 
Increase / Level  +20  +30  +40  +50 
^{Shown here to illustrate the treasure bonus effect, which is universal. A level 1 Cat with a 300% treasure bonus is not possible in game.}
Here's a more powerful illustration, Crazed Titan Cat's Health at level 1 through to level 8 would be affected as shown below 
0% Cat Shield  100% Cat Shield  200% Cat Shield  300% Cat Shield  

Level 1  3,600 initial stat  5,400 initial stat  7,200 initial stat  9,000 initial stat 
Level 2  4,320  6,480  8,640  10,800 
Level 3  5,040  7,560  10,080  12,600 
Level 4  5,760  8,640  11,520  14,400 
Level 5  6,480  9,720  12,960  16,200 
Level 6  7,200  10,800  14,400  18,000 
Level 7  7,920  11,880  15,840  19,800 
Level 8  8,640  12,960  17,280  21,600 
Increase / Level  +720  +1,080  +1,440  +1,800 
What these examples show is how powerful the treasure bonuses are on a cat's health and attack power and why it's important to obtain them.
In both of these cases and all others, it shows that any level 1 Cat with the maximum 300% treasure boost is stronger than the same cat at level 8 with 0% treasure boost.
Higher Level Cats and Level Reduction Points
For game balance the stats formula that adds 1/5th (or 20%) of the Initial Stat to the next level is tiered to apply further reductions of 1/10th of Initial Stat (or 10%) for high level mid tier cats, then reduced even further to 1/20th of Initial Stat (or 5%) for very high level top tier cats at specific points for the types detailed below.
Type  (m) 1^{st} Reduction Point ( 1/10^{th} Initial)  (p) 2^{nd} Reduction Point ( 1/20^{th} Initial ) 

Normal Cats  Level 60   
Special Cats  Level 60   
Rare Cats  Level 70  Level 90 
Super Rare Cats  Level 60  Level 80 
Crazed Cats  Level 20  Level 40 
Uber Super Rare Cats  Level 60  Level 80 
A much neater update to the level formula, than the one above, that does the same job is
Stats at level n = Treasure Bonus * Initial Stat * (1 + (n1)/5)
^{TB = Treasure Bonus = 1.5, 2.0 or 2.5 at 100%, 200% or 300%. Use when m>n as listed above.}
Here is an updated formula for highleveled Cats between the 1st reduction point (m) and 2nd reduction point (p)
Stats at level n = TB * Initial Stat * (1 + (m1)/5 + (nm)/10)
^{TB = Treasure Bonus = 1.5, 2.0 or 2.5 at 100%, 200% or 300%. m is the first reduction point, as listed above. Use when p>n>m}
Here is the updated formula for very high level and hypermax Cats beyond the 2nd reduction point (p)
Stats at level n = TB * Initial Stat * (1 + (m1)/5 + 2 + (pm)/10 + (np)/20)
^{TB = Treasure Bonus = 1.5, 2.0 or 2.5 at 100%, 200% or 300%. m is the first reduction point, p is the second reduction point, use this formula when n>p}
Below are examples for Ramen Cat's HP at level 25, 75 and 95
Stats at level 25 = 2.5 * 1050 * (1 + 24/5) = 15225 HP
^{here Treasure Bonus = 300% = 2.5 , Initial Stat = 1050 , (n1) = (251) = 24}
Stats at level 75 = 2.5 * 1050 * (1 + 69/5 + 5/10) = 40162.5 HP
^{here Treasure Bonus = 300% = 2.5 , Initial Stat = 1050 , (n1)=74 which is higher than m, therefore (m1)=69 (nm)=5}
Stats at level 95 = 2.5 * 1050 * (1 + 69/5 + 20/10 + 5/20) = 44756.25 HP
^{here Treasure Bonus = 300% = 2.5 , Initial Stat = 1050 , (n1)=94 which is higher than p, therefore (m1)=69 (pm)=20 (np)=5 }
A formula for units that have small base stats
Stats at level n = floor(Initial Stat*treasure*(1 + round((m1)/5)))
^{TB = Treasure Bonus = 1.5, 2.0 or 2.5 at 100%, 200% or 300%. Use this equation when p>n>m.}
Below are 5 example of Metal Cat's HP at level 12,13,17, 18 & 20 (300% Cat Shield):
 Level 12: floor(1 * 2.5 * (1 + round(12/5))) = floor(2.5 * (1 + 2)) = 7 HP
 Level 13: floor(1 * 2.5 * (1 + round(13/5))) = floor(2.5 * (1 + 3)) = 10 HP
 Level 17: floor(1 * 2.5 * (1 + round(17/5))) = floor(2.5 * (1 + 3)) = 10 HP
 Level 18: floor(1 * 2.5 * (1 + round(18/5))) = floor(2.5 * (1 + 4)) = 12 HP
 Level 20: floor(1 * 2.5 * (1 + round(20/5))) = floor(2.5 * (1 + 4)) = 12 HP
Money Drop increase
 Refer to the Super Register Treasure.
The treasure "Super Register" increases the money drop of enemies by 50% when it's effect is at 100%. When player has all 300% Super Register, enemy money drop is increased by 150%.
Recharging Time decrease
 Refer to the Relativity Clock Treasure.
When the player has collected 100% Clock Treasure, recharging time of all Cats decreased 30 frames, so having 300% Treasures will decrease 90 frames ~ 3 seconds. Each Cat Recharge stat level up will decrease 6 frames, at level 1 it does nothing, so at level 30 it will decrease 6x29 = 174 frames = 5.8 seconds. Having all upgrade wil decrease 264 frames ~ 8.7 seconds.
Stats provided on Cat pages include the the initial value with no Treasure and upgrade, the second value include all upgrade.
NonStarred Alien stats decrease
 Refer to the Aqua Crystal and Plasma Crystal Treasures.
These Crystals decrease nonStarred Alien Enemies' health and attack power. If an Alien's strength magnification in a level is 100%, at 0% crystal, its stats is 700%; at 200% crystal, its stats is 500%; at 400% crystals, its stats is 300% and when the player has all 600% crystals, its reduced to 100%.
Strength magnification provided in articles on this Wiki is the value when the player already collected all 600% crystal Treasure.
Starred Alien stats decrease
 Refer to the Stellar Garnet, Phoebe Beryl, Lunar Citrine, Ganymede Topaz and Callisto Amethyst treasures.
These Crystals decrease Starred Aliens' health and attack power. Starred Aliens initially have a strength magnification of 1600%. Each maxedout Crystal reduces it by 100%. This means that with 500% Crystals, they have 1100% stats by default; with 1000% Crystals, they have 600% stats by default and with 1500% Crystals they have 100% stats by default.
Currently, the strength magnification provided in articles on this Wiki is the value when the player has collected 1500% antiStarred Alien Crystal Treasures.
Fruits effect
 Refer to the Void Fruit, Blood Fruit, Sky Fruit, Heaven's Fruit, Titanium Fruit, Antimatter Fruit and Enigma Fruit treasures.
These Treasures affect cats' special abilities such as Strong Against, Massive, Resistant, Freeze and Stop. At 100% on all treasures, the Strong effect goes from 1.5x damage to 1.8x damage, and 0.5x damage received to 0.4x damage received. The Massive Damage effect goes from 3x damage to 4x damage. The Resistant effect goes from 1/4 damage received to 1/5 damage received. Finally, the status effects such as Freezing and Slowing are increased in duration by 20%, except for Weaken which is increased by 10%.
Tips
 Treasures' effects are carried over the whole gameplay so obtaining and maximizing the effect of treasures usually are an important part of the game.
 Generally, do not spend Treasure Radars on these Treasures no matter how infuriated you are with the drop rates. It may take awhile to get the Treasures, but radars are rare enough that they should not be burned on treasures. Generally use them for cats or on XP Colosseum stages.
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