Beating the Elite 4 can vary depending on the game you have however some good ideas to use are as follows: Make sure your Pokemon are at high levels using either the same or higher than the Elite 4's Pokemon, make sure you use a Pokemon with a type advantage against an Elite 4 trainer such as for example you can use Fire-types against Ice, Grass and Steel-type trainers and you can use Electric-types against Water-type and Flying-type trainers, make sure to opt to use the correct move in the proper situation so don't use your best one if your opponent only has 1 HP left unless you're certain the trainer is going to use a restorative item, make sure to stock up on items especially Revives, Full Restores and various types of Potions such as Max Potions for example and make sure you have a lot of money since you may not beat the Elite 4 on the first go-around so you may need to buy more items than you did the first time.
Also you can save before battling each trainer so that if you lose due to a mistake you made during the battle then you can just turn off the game and turn it back on and re-challenge the trainer to try it again.
Other opinions are to have a tough team that features Water, Fire and Electric-type attacks.
For the first Elite Trainer use attacks such as either Fighting, Fire, Ice or Electric-types, for the 2nd Elite Trainer use Fire, Ice or Electric-type attacks, for the 3rd Elite Trainer use Fighting-type attacks and for the 4th Elite Trainer you can use Dragon or Ice attacks and for the Champion you can use Electric and Water attacks, Water-type attacks can be used to beat Rock and Ground-types.
One suggested team for beating the Elite 4 is with Lucario, Torterra, Dialga and Honchkrow.
A suggested team for beating the Elite 4 in LeafGreen is:
Level 100 Venusaur - Solar Beam, Sunny Day, Earthquake and Frenzy Plant.
Level 62 Magcargo - Rock Slide, Fire Blast, Hyper Beam and Flamethrower
Level 87 Mewtwo - Swift, Recover, Skill Swap and Psychic
Level 94 Blastoise - Waterfall, Surf, Hydro Cannon and Hydro Pump.
Level 63 Raikou - Thundershock, Thunder, Thunderbolt and Strength.
Level 77 Articuno - Steel Wing, Ice Beam, Fly and Blizzard.
Yup. You need to beat the Elite Four and get the National Dex (beat Elite Four with at least 60 Pokemon captured).
You don't have to beat the elite four for that.
No, you can get him before the elite four.
In Ruby and Sapphire yes you need to beat the Elite Four first, but in Emerald you can catch Raquazza before or after you beat the Elite Four.
you have to beat the champion
Yes. You must beat the Elite Four to get anywhere in Kanto.
beat the elite four 900 times
Beat the elite Four Beat the elite Four Beat the elite Four
After you beat the elite four you... Gotta Catch'em All! Gotta Catch'em All!
You need to beat the elite four before you can get Zekrom.
No you can't use the azure flute after you beat the elite four
Once you beat the Elite Four there is nothing left for you to do. You can free roam around the Kanto region, level up your pokemon, you can even try and beat the Elite Four again. There is no limit on how many times you beat the Elite Four. However, with gym leaders, you can only beat them once.