Finnegan's ability is to make people say the opposite.
That is, when he asks a question, people give him answers that are contrary to what they want to say, and they act accordingly.
This ability sounds useless, but for Finnegan, who has been living on the streets all year round, it is a godsend.
His daily life, apart from fighting in groups and exploring the graffiti everywhere on the streets of Gotham, consists of having conversations similar to the following.
"You're not going to give me your wallet, are you?" "Of course not! Come on, kiddos."
Therefore, Finnegan has never worried about his future. He has been living freely on the streets of Gotham.
Until he was unfortunately regarded as an accomplice of the clown and imprisoned in Arkham.
Being locked up in a small, dark, damp and cold cell was simply torture for Finnegan, who deserved to be turned into a bed, and would rather die than be free.
So when Batman interrogated him, he offered to trade the Joker Plan for freedom, and Batman agreed.
Finnegan immediately went to the Joker, took all the plans out of him and reported them to Batman.
But Batman cheated and didn't give him freedom.
And this touched Finnegan's reverse scale, so he was just a young street gangster, and after escaping from prison, he was fully satisfied with causing trouble for Batman.
Soon, everyone in the Bat family experienced irritability.
Batman: Bruce! How could you get into such a big trouble!
Big Trouble Finnegan: Hee hee.
Cp is probably a barrel
Intention: balabal