The Boxcar Gloryholes (often shortened to TBGH or Gloryholes or just Holes)
are a fictional team of four teenage anthropomorphic turtles, who were
trained by their anthropomorphic rat sensei in the art of ninjutsu and named
after four Renaissance artists. From their home in the storm sewers of New
York City, they battle petty criminals, evil overlords and alien invaders,
all while remaining isolated from society-at-large.