"Black Pit" is an artifact costume in the StrikeForce Kitty series, based on Spider-Man Noir from the comics of the same name.
The costume name comes from noir, French for "black", and "Pit" from the costume name referencing Spider-Man.
StrikeForce Kitty 2
"artifact 13" can be equipped to a kitten that wears the "Pit" costume. "Black Pit" does melee damage, unlike "Pit", but has the same passive ability: your kittens can enter teleport portals in a level.
"Black Pit" adds 13 strength, 3 health, and 9 speed to that kitten, for a total of 26 strength, 26 health, and 20 speed, from "Pit".
StrikeForce Kitty: Last Stand
"Black Pit" is a costume that can be obtained from defeated raccoons in StrikeForce Kitty: Last Stand, look on pages in the "Melee" category.