[@Weird Tales]
"Bat Mite Jr has encyclopedic knowledge of the DC universe and his very smart when it comes to forms of energy and magic."
That means he knows everything of the universe, doesn't matter if he knows what will happen or not, Just by having that means he would already know everything about every character in the DC universe, so he'd know everything about any villain they'd have to fight, so he can pretty much instantly say their weakness and make the fight pointless. because The characters are still Official Canon even if the events aren't.