What the box makes
Perfect Pet boxes cover Tiger, Lion, Rabbit, Fox, Dragon, Griffin and Unicorn. Each box produces its named species as a Class-S raised pet with 9/9/9/9/9 grade bonuses.
The result starts with full Class-S energy and the maximum pet lives. It is a raised pet, not a pickup pet. Perfect grade bonuses do not mean that every additional awakening or equipment effect has been added.
Use the species box
Choose the box for the species you want and activate it from inventory. The box becomes the pet in its own inventory slot. This box flow does not ask you to supply a separate Egg.
Unlock the box first. Close Trade and Private Vendor, and finish any mail operation before using it. A box that is already in use or otherwise restricted cannot be opened.
Check the result
Inspect the resulting pet’s species, Class S and five grade bonuses. Continue to watch its HP and lives when summoned. Compare the actual tooltip with your build rather than selecting solely by appearance.