Sinnoh
You cannot get Rhyperior in Pokemon emerald as he is only in Pokemon diamond and pearl.
You get your Rhyhorn to evolve into a Rhyperior.(Pokemon 188 is Rhyperior)
Recruit it by holding golden mas/friend bow then go to a dungeon that has rhyperior, i know there is one but i have forgotten, then when in dungeon, go to the stairs and keep holding a+b until rhyperior come and u recruit it!
Rhyperior is a 4th generation Pokemon and therefore yo are not able to attain this in fire red. Diamond and Pearl however do have Rhyperior.
rhyperior doesn't evolve it is the 3rd and last evolsion
U Cant
no you can evolve rhydon
Rhyperior is #464 in the national pokedex, and it is a Ground-Rock type Pokemon.
Hoenn Region
rhyperior learns rock wrecker at level 61
you trade it from diamond or pearl
bertha at the Pokemon legue has it