In Teenage Mutant Ninja Turtles 2: Battle Nexus , there is no specific item or unlockable officially named "Deep Piece." This term may be a misremembered reference to "Antique Items," which are hidden collectibles found throughout the game that unlock various bonuses. Unlocking Content in Battle Nexus
: Beating the unlocked arcade game is one way to unlock secret fighters like Casey Jones , Karai , Splinter , and Slashuur for the main game. Popular Cheat Codes Teenage Mutant Ninja Turtles 2 Battle Nexus Free
Smash the crates on the roof to find a containing an antique item. In Teenage Mutant Ninja Turtles 2: Battle Nexus