Mewtwo and Kaorge or Groudon
Mewtwo is in crulan cave at the bottom you need surf rock smash and I think rockclime warning it is levle 70.
After you beat the leage and red(he has level 88 pikachu) talk to Mr. Pokemon and he will give you a red of blue orb depending on the game you have you can also get them from GB games go To the cave that has 2 ladders near yhe safri zone surf past the water fall and when you get near a semicicle of rocks look for a small gap us rock climb and enter the cave then standin there is a Pokemon if some how you get a green orb it is Rayqunza.
More tricks, tips and cheats for this game are right here - Pokemon Heart Gold cheats
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