The first guy of the elite four Sydney has a Lv.46 Mightyena, a Lv. 48 Shiftry, a Lv. 48 Cacturne, a Lv. 48 Sharpedo, and an Absol Lv. 49. The second member of the elite four Phoebe has two Dusclops, one at Lv. 48 and one at Lv. 51, two Lv. 49 Banettes, and one Sableye at Lv. 50. The third member of the elite four Glacia has two Glalies one at Lv. 50 and one at Lv. 52, two Sealios one at Lv. 50 and one at Lv. 52, and a Walrein at Lv. 53. The last member of the elite four Drake has a Lv. 53 Shellgon, two Lv. 53 Flygons, a Lv. 54 Altaria, and a Lv. 55 Salamence.
After you defeat the elite four on Pokemon sapphire you complete the pokedex and make all your Pokemon level 100.
In Ever Grande City.
Yes, after you have defeated the Elite four.
No
Elite Four Sidney/Sydney: Uses Dark Pokemon Elite Four Phoebe: Uses Ghost Pokemon Elite Four Glacia: Uses Ice Pokemon Elite Four Drake: Uses Dragon Pokemon Champion Steven: Uses mostly Steel & Rock Pokemon.
Go to the battle tower
Wallace will always be the Champion, so he'll still be at the Elite Four.
There are 69 trainers you can battle in Pokemon Sapphire. This also includes the Gym Leaders and the Elite Four.
Kyogre only.
you have to have hidden power after you beat the elite four
Try to complete the Pokédex.
any level 100 Pokemon that is a dragon type