Watching the opening cutscene of Lego Batman, This Troper wondered what a perfectly sane catburglar like Catwoman was doing in Arkham Asylum, as opposed to a regular prison. Upon completing her level in the game (at the end of which Batman captures her by putting out a saucer of milk and she just can't resist lapping it up like a cat), he understood: this version of Catwoman thinks she is actually a cat.
In Lego Harry Potter, why can the generic Death Eater pick up Mandrakes, who paralyze people with their screech? Because he's a DEAF eater!
In Lego Batman one of the Joker's unlockable outfits is a tropical tourist's garb, with a purple fedora, Hawaiian shirt and a camera. It's a funky little ensemble, until you realize that it was what he was wearing when he shot and crippled Barbara Gordon.
In Harry Potter a collectible type is "students in peril". No one seems to care about them no one notices them. Some just need to get something down or have a missing object, but what about the ones that are caught in devils snare or locked in the cupboard when the dragons destroying the towers?
Even when you know a student is trapped, you are powerless to help them until you get the right ability. In story, this can be years later.
In LEGO Batman 2, Bizarro is a DLC character. He has the exact same abilities as Superman in the game. The problem is that his breath and Eye Beams are the opposite of Superman's. Superman has heat vision and freeze breath. Bizarro is supposed to have arctic vision and fire breath.
That is original Bizarro, who was just an imperfect clone of Superman, with all his powers and none of his smarts. It's not current day Bizarro, who is the literal opposite of Superman.