Left of Viridian city is a path leading up to indigo plateau. That is the pokemon league.
You have to beat the Pokemon league 12 times then you can find it at Cerulean Cave.
If you have the starter Squirtle, you will find Rakio in the wild after beating the Pokemon League.
beat the Pokemon league
you cant
if u mean the ruby it is on one island after you beat the Pokemon league and have the national pokedex.
after u pass the Pokemon league u can find him randomly in the water near pallet town
Piplup does not exist in Pokemon LeafGreen or FireRed.
No, you cannot find cyndaquil in LeafGreen.
you should go to gamestop
Face the Pokemon League again
Yes; you find it after the Pokemon League at Route 209 with Leafgreen version in the GBA cartridge slot.
Then you have to get all the Pokemon you can and try to get all the Pokemon.