Go into victory road and walk/run around until you find it
on victory road
You cannot get the protector to evolve Rhydon in Pokemon Red version, because Rhydon's ability to evolve with a protector into Rypherior is only available in the latest versions: Pokemon Diamond, Pearl, and Platinum. It is impossible to even get a protector in Pokemon Red version, let alone evolve Rhydon.
Rhydon evolves when the "Protector" is held and the Pokemon is traded.
to evolve rhydon you need a protector. I think you can get one on stark mountain. Then you have to give it to Rhydon and trade with a friend.
Trade it with the Protector on it
At M.T Stark
You have to get the Moon stone.
You need to trade a rhydon while it holds a protector item to make it evolve to rhyperior.
You can evolve Rhydon into Rhyperior by trading...P.S Note:- Rhydon will evolve into Rhyperior in the following games : Diamond & Pearl and Platinum...Cause Rhyperior can be seen only in sinnoh region and onlydiamond & pearl and platinum contains sinnoh region pokemons..
you give rhydon the protector then you trade him to a friend then get the friend to trade him back and you have your self a rhyperior
You need to have a Rhydon and a Protector (item). Rhydon can be found in Route 227 and Route 228. You can also get Rhydon at Stark Mountain.
you can find one in victory road.