Finish your Pokedex
And Beat The Elite Four once then the second time they have stronger Pokemon
Beat your Rival
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.
There is no "Pal Park" in Pokemon Firered Version.
firered and leafgreen version
it is final gym need to beat all other gyms
beat the Pokemon league
Catch all the Pokemon!
beat the elite four and the champion.
Get it from Pokemon emerald.
The emerald doesn't exist in firered.