yes swarpert is a greatest Pokemon to defeat elite four
swampert, groudon, blastoise, glalie, latios, and feraligator
Wailord
you defeat the elite four by training a particular Pokemon and getting it to a high level(e.g. lv64) you also give it the best four moves that you have. try to give it moves that have a lot of pp though because you need to defeat the elite four who have a lot of Pokemon!
Swampert
swampert miltic
The best way to defeat them is to train your Pokemon. No Pokemon will be above level 50 or something like that. The 4 main elite four, their Pokemon are only in their forties.
The best levels to have are 60 or above Pokemon wise i doesn't matter the easiest way to beat the elite four is train Pokemon that defeat each members Pokemon.
Out of Sydney`s Pokemon I`d have to say Shiftry is the best. Out of whats-her-face`s Pokemon I`d have to say Dustclops is the best. Out of Glacia`s Pokemon I`d have to say Walrein is the best. Out of Drake`s Pokemon I`d have to say Salamence is the best.
The best water Pokemon in Pokemon emerald I believe is Kyogre. kyogre is probably the stongest but i prefer a swampert if you don't like legenderies
victory road
swampert or blaziken are the best type to beat gyms or Pokemon league
for swampert the best moves surf mudshot water pulse and headbutt i think that mudshot isn't such a good move considering that swampert isn't good in special attack and mudshot is a weak special attack. so teach it like a focus punch or something like that. and replace water pulse with hydro pump or blizzard.