Beat Your Rival VERY Easily!:

First you need a link cable. Then pick Bulbasaur as your first pokemon. Then try to defeat Charmander at the beginning. If you win go to the next town and trade your bulbasaur for a freinds sqirtle. {because gary picks the pokemon that has a advantige against yours} you can now train squirtle to a blastouse and defeat Charzard!