Beat red,and battle groudon (after beating red and getting the red orb from Mr.Pokemon ) and if you catch groudon trade with someone who has heartgold that has kyogre and go back to the same cave you got groudon and find requaza and beat/capture him. !
That would depend on the game you're playing however if you're fighting Silver in HeartGold or SoulSilver then he will have Gastly, Haunter, Gengar, Zubat, Golbat, Crobat, Magnemite, Magneton, Sneasel, Kadabra, Alakazam and one of the Starters and for Gastly/Haunter/Gengar and Zubat/Golbat/Crobat you can use Psychic-types in order to beat them and you can use Electric-types in order to beat Zubat/Golbat/Crobat as well, you can use Fire-type Pokemon in order to beat Magnemite/Magneton, you can use Fighting-type Pokemon in order to beat Sneasel and you can use Bug, Dark or Ghost-type Pokemon in order to beat Kadabra/Alakazam.
beat the last gym leader on soul silver in johto
You must beat Red, the game's version of Ash, at the top of Mount Silver.
Red does not reappear after you beat him.
You have to beat red in order to beat the game.
In silver, you have to beat red in the silver cave. After you beat him, go talk to prof. oak and he will give it to you.
After you beat Falkner, he is always in the gym.
no one knows but you can battle him again if you beat the elite four again.
Go to Kanto, beat the gyms, go to Mt Silver and beat Red.
You beat all of her Pokemon. You beat all of her Pokemon.
You can only beat him once.
He is still there.
you get it from prof. Oak after you beat red on mt. silver.