50+, make sure you have a good team
I beat the elite 4 with level 60,70,and 1 level 100 so approximately level 65
You could level your Pokemon faster
Level 300
Well,Level 70-100 Is A Good Level To Beat The Elite 4.
you just have to have a good combination of types, all around level 60 to 65.
get one pokemon to level 100
an level hundred
On at least level 50.
Have at least 3 level 50-60 Pokemon in you're party,and afew regular Pokemon to sacrifice to use a revive.
high leveled legys around level 65
The elite 4's Pokemon the first time you beat it the level range is 40-55. After you beat all the gyms the level range is 50-75.
Use different pokemon. They should be at least level 50 the first time and level 70 the second.