defeat the Elite 4 and after that, Gary.
Mr. Pokemon gives it to you after you beat the Pokemon league and red
he is in cerulean cave at the very bottom, you need to beat the league to acess the cave though
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
Probably, it doesn't seem as though there will be any further games after Platinum
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.
Pokemon HG/SS is pretty hard to complete. at the end u have to defeat Red and then u get another 2 starters :) Red is hard though i did it within 1 go :P and the league is hard to i didn't do that in 1 go though :P Hope this helped.
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