I equipped battle item's on my pets but when i enter a battle, all i see is a slots spork. Can anybody help me ?

im guessing you have less than three infinite use items.

Just have more than 3 infinite use items and the problem will be gone.

You only need 3 (maybe even 2) items equipped. Make sure they are infinite use, otherwise once the one-use are gone the items will turn to sporks.