Is anyone aware of an addon that can modify the auction house search back to the way it was before pet battles? Before Pet Battles, if you clicked the option to only show usuable items, it only showed pets you did not own. Now that option does nothing, showing every pet in the section regardless of how many of them you already own.
I miss that functionality as well. I know Pokemon Trainer has an option to color known and unknown pets in the auction house. I'm not sure if there are any similar stand-alone addons.
I use Better Battle Pet Tooltip and whenever I'm unsure that I know it, I just look at the pet's tooltip.