Some cards have specific Traits which can affect them from particular skills. Certain skills can only affect cards in their same trait group. For example, Drunk Fry can Shield another card ONLY if it also has the Drunk trait. It is a similar effect to when skills can only affect cards from the same show.
These traits can also have a big impact during Special Events. Special Events change from time to time, and can be viewed by tapping on the Special Events tab at the top of the home screen. Example: During the "Round on the House" event, cards with the Drunk trait get healed a certain amount each turn.
There are currently Eleven (11) traits in Animation Throwdown: