RhinoRoller

"This armor plated beast rolls itself into a ball that knock down enemies." The Rhinoroller is a Titan that can curl up into a ball and can roll with Crash walking on top of it. The Rhinoroller appears in Crash of the Titans and Crash: Mind Over Mutant. In Crash: Mind Over Mutant, when it is jacked it goes into its ball form and cannot attack with its horn until unjacked, unlike COTT when it walks and attacks with its horn even when jacked. It can take down a Scorporilla if it has enough speed. In a level in Crash: Mind Over Mutant, a group of Rhinorollers that are free from Cortex's control can be found in a cave in the Wasteland. In Crash: Mind Over Mutant, Crash can ride Rhinorollers down rails. A Rhinoroller kid will give Crash a minigame when talked to after beating Cortex.

Biology
Rhinoroller is a huge quadrupedal titan. Rhinoroller's body covered in hard plates and spikes on its back. Rhinoroller also has huge claws, but they rely on rolling to attack. Rhinoroller has two horns on its face and often used to destroy its prey. It also has huge jaws w/ gigantic canines extending from its mouth and a spiky beard, to look more intimidating. Rhinoroller is very dangerous with its intimidating face and huge size completed with brutal nature, a single eye contact could enrages Rhinoroller and run its victim flat until its prey is defeated. Rhinoroller also has tremendous power, it could destroy a huge titan in short time, it is very slow when not rolling though. It's a mix between Rhinoceros, Armadillo, and Saber-Toothed Cat (or Smilodon as referred scientifically) given the appearance.