anyone, all you have to do is 1.get two ds and Pokemon game card's and trade with your self 2.get someone to trade with you(in the Pokemon center)then trade them back PS.you don't need to do anything else just trade. 3.go to the international trading center(in oreburgh city)hope it help's
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you must have a graveller then trade with fire red or leaf green!
Catch a Geodude, evolve it into Graveller at level 25, then trade it to another game for it to evolve into Golem, and trade it back to your original game.
geodude evolves into graveller at level 25 and graveller evolves into golem when link traded... ^_^
There is supposed to be some sort of NPC that will trade you a graveller for one of your pokemon. I think he's in the big shopping mall building, but I'm not completely certain, as I haven't played Yellow in a long time.
Haunter to gengar...graveller to golem...kadabra to alakazam..polywhirl to polytoad (make sure its holding king's rock)...slowbro to slowking (king's rock)..all i can think of so far :|