Hey, it says none of my pets are eligible but the guy I use to battle with is famished and very happy x_x

Famished means hungry. He needs to be full or bloated. Feed him pumpkins or something and you should be fine!

Thanks for the response, but now he's bloated and very happy and still can't do it x_x

Same problem here... o.o I only can use my weak pets, but why? After I loose a battle with one of my pets, I could't use that one too!

Is their HP full or empty? Go to the healer an be healed.

you in particular, if you just lost a battle your pet has no HP left. Go heal them.

Of course I healed them ^^ But I found out the problem, one of my pets was in battle S:

I've tried all these things...he's bloated, very happy, and has full HP, and I'm still not allowed to battle...

Maybe your Pets are still stuck in a former battle. Go here to check if that's the case: Click!

Oh Ok mine was still in a battle, thanks^^ still not allowed though...maybe I just need to give it time to process? I know some things are like that on here.

Go back to the healer, forfeiting the battle dropped his hp to zero ;)

Yep I think I'm good to go now, thanks :)