The Lion - Batman: Arkham Unhinged

A member of The Wonderland Gang, The Lion, aka Lewis Yarnell uses his previous experience as a bodyguard and his sharpened nails to fight off any opponent in single combat. 

A prisoner in Arkham City, he returned to working for the Mad Hatter, acting as muscle for Tetch and defending the Hatter’s Hat Shop from intruders. 

Despite his best efforts, he was no match for Batman who took him out with a blast from his REC.