The Shell of Justice is an updated and futuristic version of the lair of the turtles, as if from an alternate reality, and the home of the Super Turtles. It appears in the "Reality Check" episode of the 2003-2009 animated TV series.[1] While similar in internal appearance to the Ninja Turtles' lair, it is above-ground and has several lower levels, including a holographic training simulator.
It is an obvious reference to the Hall of Justice in the DC Universe, which serves as the headquarters and residence of the Super Friends and Justice League.