Kimberly calling in her Zord to take care of the Batmobile might seem like overkill until you remember one of the rules Zordon had for the Rangers: never escalate a battle. By disarming and then firing that missile at them, Batman and the Flash did just that, so Kim was justified in her retaliation.
Likewise, Flash was justified in calling in the rest of the League.
Not really a Fridge but when Cyborg called the Power Rangers without their Morphers and Power Coins "powerless", Batman snapped back and told Cyborg off. Batman may be a jerk at times, but he does have his heart of gold. That heart of gold came into play as Batman himself is powerless but he has all those Bat gadgets, Batmobile, etc. to help him fight, similar to how the teens have their Ranger powers to help them fight better.
