There really isn't a best Pokemon team for the Elite Four. All you need are strong Pokemon, items like full restores, and Pokemon you have trained all along your journey. But, your best bet is to use your starter and maybe a few legendaries. Pokemon who are good against all the people will do as long as they are high leveled.
regice for bug(number 1)
Wailord for ground(number 2)
gyrados or id recomend kyogre(number 3)
gengar for psychic(number 4)
and for Cynthia the champion all those Pokemon and some others of your choice because she has many types.
Probably ferligatr.(it evolves from totodile) Ferligatr is good against the psychic type because of the move 'crunch.' The psychic type is weak to dark and have low defense. The other members shouldn't be too hard. Lance, the gym leader, specializes in dragon type pokemon. Dragon type is weak to ice, and Ferilgatr is half ice type. If you decide on Ferilgatr, make sure it knows at least one damaging ice type move. Unfortunately, the dragonites Lance have know electric type moves and Ferilgatr is weak to electric moves. So make sure that the Ferilgatr is at least level 50. That's why I think Ferilgatr is best for the Elite 4. Hope this helped! :)
Usually Pokemon that have a type advantge over the elite fours.
pickachoo
When youre versing the champion
get the ruby sapphire
You will receive it after beating the elite four and defeating Team Plasma.
The best way is to give a weaker Pokemon a exp. share then keep beating the elite four. If you can't beat the elite four then you might want to use the vs. seeker and look for trianers to battle.
level 100
I think an: .Infernape .Giratina
in what game of Pokemon
FAP
You find him in meteor cave after beating the elite four.
Beat them and the champion
Have a good Fire and/or Ground Type...
hacks. and pokemon that are able to evolve with the dusk stone won't until you get the new pokedex (after beating the elite four)
Prof oak after beating the elite four.
At 'N's Castle after beating the Elite Four.
by beating the Elite four. no i TRIED THAT ass
Yes.