In The Manhattan Project, the the Kraang bring several worms to Earth to extract their mutagen. The Kraathatrogons travel through old pneumatic subway systems, and their enormous size causes strong seismic vibrations mistaken for earthquakes. When Casey Jones attempts to stop them, one swallows him. Donatello and April O'Neil kill it with salt. Later, April and Casey ride a worm to battle and Tiger Claw gets eaten, and this Kraathatrogon is sent through a portal to the 1987 TV series dimension.
In Into Dimension X!, a Kraathatrogon appears flying over Raphael's head. Later, several baby worms are seen feeding on their mother's mutagen.
In Battle for New York, Part 2, a kraathatrogon appears and attacks the Turtle Blimp which it succeeds in destroying. Luckily Mikey manages to scare it away by throwing some energy crystals at its butt-face.