A Cat's Eye is an obtainable item which allows you to further upgrade your units, except Normal Cats and certain special units such as Bahamut Cat and Valkyrie Cat, past Lv.30. Each Cat's Eye allows the user to increase the maximum level cap of a unit by 1, but the player still needs to use XP to upgrade the Cat to that level. The maximum cap level allowed by using Cat's Eyes is level limit of +10 (+20 if all SoL stages are beated, after v7.0).
Example: Jizo (Lv.30+0) can reach Jizo (Lv.31+0), with maximum cap of Jizo (Lv40+0 (50+0 if all SoL stages are beated, after v7.0)).
The cat unit also has to reach max level 30 from XP upgrades first, therefore making it impossible for a player to use Cat's Eyes on every unit before reaching specific User Rank levels, even if a player gained Cat's Eyes beforehand.
From left to right respectively EX, Rare, Super Rare and Uber Rare Cat's Eyes.
Obtaining Cat's Eyes
Cat's Eyes can be obtained from Gamatoto Expedition with rare drop rates or as special rewards. You can find the number of Cat's Eyes you currently have in the cat upgrade screen. They can also be obtained in The Heavenly Tower.
Increasing level limit of cat units
The button to increase level limit, darkens out when not available.
Increased level limit
Numbers of Cat's Eyes available respective to each categories.
The right top icons display the numbers of Cat's Eye you have
The upgrade button will change to the golden text colored Cat's Eye upgrade button if available.