To get to the Pokemon League in Firered/Leafgreen. You must have all 8 gym badges, have a team that knows all HM's(you'll need them), and a strong team to get past the trainers. Best of luck.
Pokemon Master Chewie.
Mr. Pokemon gives it to you after you beat the Pokemon league and red
hes is the pokemon league champion
darkrai
Your rival is the champion.
Games: Pokemon Red Pokemon Blue Pokemon Green Anime: Pokemon League Indigo Pokemon Indigo League Pokemon Indigo Plateau
you fill your pokedex
defeat the Elite 4 and after that, Gary.
First, you have to defeat the Pokemon league 10 times.Then, this guy in the Pokemon center at the Pokemon league will ask you what your favorite color is, red or blue. If you pick red you get Latias and if you pick blue you get Latios.
YES, YOU DUMMY!(after you defeat the Pokemon League and get the Ruby/Sapphire.)
there is no league all you have to do is vs red at mt silver peak but he has Pokemon over lvl 80
He disappears until you beat the Pokemon league again.
You do not need to go to the Pokemon league to get shinies, you can get shiny Pokemon anywhere, but they are VERY rare, and if you are playing Red, Blue, or Green, they are not in those games.