You must trade it from Ruby/Sapphire/Emerald. It is not available in FireRed and LeafGreen otherwise.
First of all you can't catch chinchou in leafgreen second of all you can't use the HM dive because its not a HM in the game so you need to trade one from ruby or sapphire or emerald.
Chinchou is a Water and Electric type pokemon.
Do you mean Chimchar? If thats it no if thats not it the pokemon chinchou dosen't exist
Chinchou evolves at lvl 39 in Pokemon indigo glad i helped STI
Chinchou will evolve to lanturn i think at level 36.
In the national pokedex, Chinchou is the 170th pokemon.
Chinchou is #170 in the national pokedex, and it is a Water-Electric type Pokemon.
Chinchou which evolves into Lanturn.