Psirollers (also called Rhinorollers) are monsters resembling rhinos riding on large wheels that they use to attack. Due to this wheel, they can move at high speeds and have very quick and powerful techniques like "Drift," "0 to 60," and "Mega Roller." Even though they are on this roller most of the time, there are a few times when they do get off of them, although they hobble quite a bit because their back legs are much smaller than the front ones.

It first appeared in Monster Rancher Explorer as an obstacle monster, but eventually became unlockable in Monster Rancher 3. A non-playable Psiroller is used for one of the circus acts in Monster Rancher EVO, and a new rhinoceros-type monster can be seen in the marketing for Monster Farm Online, although none was ever released in the game itself.


Psiroller is a mistranslation of sairoller, sai being the Japanese word for rhinoceros.


Game Name Description Image
Monster Rancher 3 Psiroller "This monster was recently discovered, and many things are still unknown. Is it just a rhino, or is the roller alive too? It's still often debated." Psiroller MR3
Monster Rancher 4 Rhinoroller "How the Rhinoroller's body works is a mystery. Scientists discuss it but never come up with anything. All they know is it loves napping and driving." Psiroller MR4
Monster Rancher EVO Psiroller A non-playable Psiroller is used for the "Box Magic" trick.
Monster Rancher Advance Psiroller N/A Psiroller MRAPsiroller MRA1
Monster Rancher Advance 2 Psiroller N/A Psiroller MRA1
Monster Farm Online N/A A non-playable rhinoceros monster can be seen in marketing for the game. Psiroller MFO
Monster Rancher Explorer Psiroller Non-playable Obstacle. Rolls around along any surface that it touches in a single direction. Can be only be killed if shot. Psiroller MREx


  • To obtain a Psiroller in Monster Rancher 3, use
  • To obtain a Rhinoroller in Monster Rancher 4, use
  • To obtain a Psiroller in Monster Rancher Advance, use the password Sue.
  • To obtain a Psiroller in Monster Rancher Advance 2, use the password LoVeR, but only after receiving the 2nd stable upgrade from Bint.


See here for a complete list of Psiroller Techniques.


For more pictures and screenshots of Psiroller, click here.