Finish your Pokedex
And Beat The Elite Four once then the second time they have stronger Pokemon
beat the eliet 4 and get all Pokemon
yu have to beat the indigo league then you go to champions cave.
Chinchou is not available in Pokemon Firered Version. You can only get it by trading from Pokemon Ruby / Sapphire / Emerald Version.
use that gameshark user.
firered and leafgreen version
There is no "Pal Park" in Pokemon Firered Version.
it is final gym need to beat all other gyms
beat the Pokemon league
Catch all the Pokemon!
Get it from Pokemon emerald.
beat the elite four and the champion.
The emerald doesn't exist in firered.