You need to first obtain the old amber which is given by a scientist in the pewter city museum but to reach him you need Cut. Once you get the old amber go to cinnibar island and go into the lab go into the last room and show the scientist the old amber he will change it into aerodactyl but first leave the lab then go back and talk to the scientist again now you have aerodactyl.
Why defeat it, catch it instead.
you do not
defeat team rocket .
You can't defeat them without battling. If you have cheats you can.
Wrong game! Fortree city is in ruby, sapphire and emerald not leafgreen.
Simply defeat another trainer.
defeat it
defeat it in battle
After you defeat the Elite Four.
Red is the boy playable character in leafgreen you don't defeat him because you are him.
Go defeat the 4th? :)
All you need to do is find Giovanni and defeat him.