Tattoo shops allow you to modify a creatures attributes, making them more customizable and stronger. Your creatures are allowed up to 5 different tattoos, each assigned to a unique body part.
You can find the first tattooing shop by visiting Happy Screams Tattoos in Onyx City.
Tattoos have the following limitations:
You can increase your odds of a successful tattooing, and decrease the coin costs associated, with the Player Growth Attribute Tattooist and the Credit Shop Key Item Tattoo Machine.