Gary until you beat him and then you get put into the hall of fame and you become champion
You have to beat the original champion in the game
The champion is your rival.
In the Pokemon league.
Your rival is the champion.
beat the Pokemon league
The strongest trainer in the game besides the one's in trainer tower is your rival is the current champion of the Pokemon league if you defeat the elite four you have the opportunity to defeat him.
after beating eliet 4 and champion
you cant
Lance
he is the Pokemon league champion
By beating the elite for then Beating the champion.
Defeat the elite four and become Pokemon champion with 60 Pokemon recorded in your pokedex.