Stupidity: Batman should've noticed the pink pants the bat creature wore when it attacked him in the zoo thus showing it wasn't Kirk Langstrom. He's noticed things in other fights.
Suggested correction: Are you suggesting Kirk couldn't change his pants?
Well it'd seem ridiculous given his changes probably happen at any time like The Lizard's who also never changes pants.
So Kurt Conners and Kirk Langstrom both wear the same pants for the rest of their lives? They never change clothes when in human form?
Stupidity: Very heroic of Michael to save his brother, but the way the scene plays out, there's no reason why he had to get on the railway tracks himself and shove him away taking a train to the knee rather than just grab his arm and pull him, which would have been much quicker. Note; he did not rush to him and tackle him, which could very well happen in the heat of the moment. He jumped on the tracks, grabbed him, turned around, and gave him a push. That's very awkward to look at and unnatural.
Stupidity: This is a meticulously planned sting with 2 million dollars in cash as bait, so naturally it is carried out with just 3 policemen (2 officers and a rookie), no supervision and two of the cops are nowhere near the scene until the last second, for reasons never specified.
Stupidity: Alfred should've recognized Poison Ivy having seen her before, such as in the episode Pretty Poison.
Stupidity: Kyodai Ken has no reason to take Summer Gleason back to his hideout. He could've dumped her off in an alley.
Suggested correction: He abducted her to ensure that Bruce would show up.