"Pokemon Crystal: In topic - The Twilight Saga"
In Pokemon Crystal, to obtain the Poké Flute (which is what I assume you meant by "poke lullaby"), you need to first wake up Snorlax blocking the path on Route 11. You can do this by getting the Expansion Card from the radio station in Lavender Town and tuning your radio to the Poke Flute channel. Once Snorlax is awake, you can capture or defeat it to clear the path.
Move the dot on the radio to te middle line, and go up until it says Poke Flute.
buy them from the poke mart if you have a lot of money.
The underground started in diamond and pearl so there is no underground in crystal.
In poke marts
By beating the Gym Leaders in the various towns
Ok this is 'Poke-Master' here telling you how to get a totadile in pkmn Crystal. You trade. Then keep it! GO ENTEI
By going to a pokemart in any town and buying pokeballs from there.
use the app on the pokegear and go to the music thing and go to #20
Hey man, whats up? Im fine thanks
That means you didn't get the 3rd badge yet.
Only your mom in the game can buy them.Tell her to save your money and she will call you saying she buyed something
It is called a lullaby.