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
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 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.
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
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.
swampert or blaziken are the best type to beat gyms or Pokemon league