all you have to do is to beat all the 8 gym leaders! Then go to New Bark and swim right... Across that looooong path you will find Indigo Plateau, where the Champion is.
Just use you strongest Pokemon to beat the Pokemon League. Also it depends on the Pokemon you're using
In any Pokemon game, you must defeat the elite four and the champion.
the sinnoh league champion. defeat her and become the champion.
you defeat all the elites(4 of them) and the previous champion
get rare Pokemon and beat him with them!
Defeat the Champion in the Elite Four.
At the end of the elite 4 he is the champion.
You can get 4 master balls in pokemon crystal. 1st 2nd & 3rd: AFTER you defeat the gym leaders of Johto find prof.oak & he will give you 3 master balls! 4th: AFTER you beat the elete 4 and the champion you go to prof.elm and he will give you 1 master ball!
you have to defeat the elite four and then the champion
To complete the storyline you have to beat the Elite 4 To really beat the game you have to defeat Red on Mt.Silver To become a Pokemon master though, you have to catch all 251 Pokemon available in Crystal version
To defeat Team Galactic, complete your pokedex, and defeat the Elite Four and Champion.
The Karate King! You can get a Tyrongue if you defeat him.
defeat Whitney the third gym leader