go underground, get a sphere, and bury it. check on it a few days later!
you go through mt. cournet as you battle team Galactic.
Bury any blue sphere size 38 or lower in the ground and occasionally check the sphere until it is size 39
You can get to Sunyshore city in Pokemon Pear after you defeat the first seven gym badges and Cyrus at the stone pillars. The entrance to Sunyshore is to the right of the beach resort.
I can't name them all, so head to this site: http://www.psypokes.com/dp/undergrounditems.php
pearl's crystal structure is a sphere.
1st time: Go again. 2nd time: Catch Heatran, have little sphere
Pokemon
Spear Pilllar in Pokemon diamond/pearl/platinum is at the top of Mt. Coronet and has a bunch of broken pillars on the sides of a sort of street leading to your first legendary pokemon and behind the pokemon will be an item that only that legendary can use.
you cant get a diamond on Pokemon pearl but you can get a pearl on diammond ...and pearl.
Pokemon no.147 in the Pokemon Pearl National Pokedex is Dratini.
If you continue on the game, you'll meet palkia later at a place with a bunch of pillars, i forgets the name ^.^" but if you go on with the game youll be given a masterball to catch it.