The C2 Grendel for C3/DS is a new Grendel breed created by Pharoah: "This is my new Grendel Breed converted from C2 to C3/DS! They have a new genome for better behavior and they occupy Grendel slot T." Get them at Breed Storage It is a conversion of the Bulbous Grendel from C2.
This breed has been known to cause some game crashes. A fix made by Norngirl can be downloaded at Norngirl's Temporary Storage Place.