Here are different ways to think about it:
I use Rhyperior and it is one of my best Pokemon.
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2 ways number 1 is give rydon a protector then go to the GTS station at jublife city and trade it to a friend and get him to trade it to you back then youll have ryperior or.... put rydon on offer still with the protecter then go on seek Pokemon press A on the Pokemon you want then trade it (if you have it of cource) finally go on summary on the GTS menu and press A when rydon comes up youlll have rydon for about 10 seconds then he will quickly evolve in to rypherior P.S you get rydon round the field area of spark mountain enjoy!
first get a rhydon if you want of height level max go to route 228 when you got it trade it with the protector and rhydon evoloves the trade it back. NOTE: when rhydon evoloves he dosent have protector any more
Good against steel Pokemon are fire and water Pokemon.
Yes, Haunter is a very good Pokemon
it is actually a good Pokemon if you have 1 then you will just destroy Psychic type Pokemon