Try to be at an even higher level, if at all possible.
Be just as stocked up on healing items as you were before the first time.
I wish you all the luck.
its you become powerful then if you become powerful you will defeat the elite four
you defeat the elite four you defeat the elite four
You don't need to defeat the elite four twice. Only do it if you want to!
defeat the elite four
yes swarpert is a greatest Pokemon to defeat elite four
Aaron of the elite four uses bug types. He is the first you have to defeat. Bertha is the second of the elite four and uses ground types Flint is the third of the elite four and uses fire types Lucian is the last of the elite four and uses psychic type.
To get the second Elite Four, you must have already defeated the Elite Four the first time, and the second time you go to fight them, they will all be leveled up, and become the 'Second Elite Four'.
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!
defeat the elite four
When you defeat the elite four now you will go to the cave in Cerulean City.
At least lv.60 but I recommend 70
If you defeat the elite four and lance then you go to the Kanto reigon to defeat the other eight gym leaders the you will fight the boss after you have the 16 gym leaders.