Kretches had six legs, two jaws, and a barbed tail. During the visit of Leia Organa Solo to Belsavis while she was searching for information about the children of the Jedi, she was attacked by one such creature and later threatened with a swarm of them by Irek Ismaren to help in her capture. The Jedi children, during their stay with Ho'Din Jedi Plett, were warned from straying into the crypts adjoining his home with the saying "the kretch will get you."
In 22 BBY, a young Boba Fett encountered a kretch in the dank tunnels of Aargau's Undercity while on his quest to secure the fortune left to him by his father Jango. The enterprising future bounty hunter quickly and efficiently dispatched it with the solid thrust of his boot.
The creature was the namesake of the Belsavis Kretch smashball team.
- The Essential Guide to Planets and Moons