If you have beaten the Elite Four then clone it. If you havent then you can buy HP UP so you can boost up your level 100's HP. It really all depends on what you want to do do with it.
Level 100.
Well you can't catch level 100 wild Pokemon in emerald, so get up and start training if you want a level 100
The highest levels for pokemon is 100.
You can't find level 100 Pokemon you have to train a Pokemon to that level yourself.
lv 100
or u can cheat by looking here gamecheats.net
5-100
The Leaders Pokemon are level 100 as well as the Pokemon you are given In the battle frontier (Ruby,Emerald,Saphire)
nope i have a darkrai level 100 and it wont go higher same in emerald just with rayquaza and latios but can you please tell me what Pokemon your talking about you don't have to i am just wondering yourwelcome for the help
There really isn't much you can do with it. You can level up some other mon to lvl100
No ,,find him in the cave near route 115 after every Pokemon is on level 100
Lairon evolves at level 42-45 in Pokemon Emerald version.