Rayquaza
deoxys
mew
groundon
Kyrouge
Ho-oh
Lugia
Maybe latias and latios.
no but can in emerald!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
you can if you have a gameshark
In general, there are 6 legendary Pokemons in Emerald. If you count the Event Pokemons in Emerald, then there are 12 legendary Pokemons in Emerald.
Kyogre,Groudon, raquaza, Latias and (or) Latios
Including the event only's here are the legendaries in emerald: Latios/Latias, Kyogre, Groudon, Rayquaza, Deoxys, Regice, Registeel, Regirock, Mew.
all the legendaries and how to get them here http://www.psypokes.com/emerald/legendaries.php
anything except the legendaries
After the big battle with all the three legendaries, you cant, unless you have a cheat.
I think it's just Rayquaza, not sure where though.
Probably Smeargle.
LAtiois latias regirock stell ice groudan kyogure groudon
no only 2 legendaries are permittted to enter latios and latias