The Bonecruncha is an Ork vehicle. Its primary armament is a Dethrolla that allows it to smash through enemy infantry formations, but it is also equipped with a series of Autocannons and Big Shootas.
The only way to differentiate between the Bonecruncha with the other Ork Heavy tanks is that its main turreted mount consists of a twin-linked armament akin to the Mammoth tank of Command and Conquer or the Grizzly tank from Halo. Additionally, similar to the Bonebreaka, the Bonecruncha's shares the same Rhino chassis.
The Bonecruncha along with the Bonebreaka could be classified as a true Ork Heavy tank as it is smaller than the Battlefortress but still packs a considerable and heavy punch.