RE: The HG/SS Question and Answers thread
Ok, I hate it when people ask these types of questions. The only way to beat the elite four (first or second time?) is to have decent pokemon with the same, if not higher level than your opponent. The pokemon you use should be to your liking.
Here is the order of types the elite four use:
1st-Psychic
2nd-Status (poisons, paralyzes, confuses, etc. your pokemon)
3rd-Fighting (looks like fire type, so beware)
4th-Dark (dont let Umbreon get its double team in)
champion-Dragon