The answer to that is the Fight Area. Just like almost any other Pokemon game like Diamond and Pearl.
AnswerThe following Pokemon can be obtained in the Pokemon Emerald Safari Zone: On landOddishGloomGirafarigDodouDodrioNatuXatuPikachuWobbuffetRhyhornPinsirHeracrossPhanpyGeodudeMareepSunkernSpinarakAipomHoothootGligarSnubbulTeddiursaLedybaPinecoShuckleMiltankHoundourStantlerWhile Surfing or fishingMarillWooperQuagsireGoldeenSeakingMagikarpRemoraidOctilleryPsyduckGolduckOnce you have defeated the Elite Four, two new areas of the Safari Zone will be open for you to explore. It is in these areas which you may catch Johto Pokemon.
After completing the Battle Frontier you can explore the game world for post-Elite Four side quests or areas. These side quests tend to involve Legendary Pokemon that don't appear till after the Elite Four and Champion are defeated. There are also areas that unlock after defeating the Elite Four, these areas usually contain Legendary Pokemon or Pokemon you couldn't find elsewhere.
In the grassy areas
After beating the elite 4, new areas in the Safari Zone will be unlocked. Walk around wild grass in Areas 5 &6. Hope this helped!
The grassy areas where you start out.
You beat the elite four. That is only if you have emerald. _tu Hoang
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either you hack it or you unlock all of the areas and find every single Pokemon
you have to get a national dex.
You have to beat the Elite floor and Complete the Sinnoh Pokedex then go talk to Prof. Rowan and Prof. Oak will give you a nother pokedex and new places will be unlocked. Enjoy =]
Actually, Emerald version (along with R/S/FR/LG) has 386 Pokemon and if you have a look at a R/S/E/FR/LG pokedex you'll see all the areas
Red shards can be found all over underwater areas