You can only Catchall Pokemon in Emerald using a Hacked Rom OR Patching OR Cheating with Codes such as GameShark & Codebreaker & Action Replay.
For those who like legit ways you cant catch but you can get all Pokemon by trading from others using two Gameboy Advance with Cartridges or use VisualBoyAdvaceLink (its an Emulator for Playing GB/GBC/GBA roms on PC) its Better option in my opinion.For Trading you can get save files from various websites or Simply use your savegames in Both Windows.
Search on Google for link to VBA Link's Homepage. 1.8.0 beta3 was latest version when I Checked it Last.
Hope this Helps !!!!!
if you don't have that Pokemon just catch it and evolve it
Catch all the pokemon.
You cannot catch all the pokemon in emerald. You much catch the maximum for that game, and trade or cheat in the rest.
YES!!!!!!!! all you have to do is see all the Pokemon and catch the ones you can catch in the game!!!
No you just need to SEE all the Pokemon in emerald pokedex
no but if you catch all the hoenn pokemon you can catch jotho and kanto pokemon
Yes, You can catch Groudon in Pokemon Emerald.
You can't catch one in Pokemon Emerald.
No to get Cyndaquil you must catch all Pokemon from that region, because if you have to catch every single Pokemon, won't you already have Cyndaquil?
No you cannot catch Entei in Pokemon Emerald.
You can't catch a Bellsprot in Pokemon Emerald. You trade it from Pokemon Leafgreen!
There are many Pokemon you catch that are similar in sapphire and emerald but there are many Pokemon emerald can only get and not sapphire.