The following:
Suicune, Raikou or Entei depending on your starter
Mewtwo in CERULEAN CAVE
Ho-oh and Lugia on EIGHT ISLAND
Deoxys on NINE ISLAND
Moltres, Zapdos and Articuno.
Moltres is in Mt. Ember.
Zapdos is in the Power Plant.
Articuno is in Seafoam Islands.
-_- -_-
you can go and catch rare pokemons,go to different places,and yea
You can Give it to your Pokemon to hold not use then Clone the Pokemon at your PC
safari zone any area but its very rare
You can find it in the safari zone (it's really rare and hard to catch)
Safari Zone Areas 2 & 3, it's Rare.
You can catch her on route 103, really rare though so look hard! :)
in the safari zone where you first walk in (hard to catch and rare to see though) or buy at the game corner for about $5,500
One of the rear Pokemons is Whalelord...
Kangaskahn can be found in the Safari Zone mostly in Area 1 however it is a rare pokemon so its tough to find.
have emerald clone Pokemon with a rare candy 999 times they catch 999 Pokemon that your already caught use repeat ball that it
you cannot get a gyrados wild but you can catch a magikarp above lvl 20 and use a rare candy or train it one lvl