Titan Joker

Titan Joker is a giant monster version of The Joker and the final boss in Batman; Arkham Asylum. In the Video game, Joker created a formula with the help of Bane's Venom called the Titan Formula. His grand scheme was to create an army of Titans to take over and destroy gotham. When his plan fails, it looks like he commited suicide, but really he injected the Titan Formula and turned into The Titan Joker.

Appearence
Titan Joker is about as tall as Killer Croc. He's an incredibly muscluar monster, a lot of his bones and fingernails are sharpen and revealed, and his hair is now a mohawk.

The Boss Battle Itself
During the boss fight Titan Joker will try hit Batman with his claw. After some time he retreats and calles some of his minions. As time goes on he gets distracted by Jack Ryder's Helicopter, Batman uses his Ultra-Batclaw. Joker falls and gets stuck. Joker then gets hit by Batman. Do this about 3 times and Titan Joker is defeated.