ride your bike really fast, going over every cracked piece only once. at the top you'll find a level 70 rayquaza.
In sky pillar.
sky pillar doesn't exist in Sapphire or ruby, only in emerald
in sootopolis city
its in eterna city
sky pillar
you can't
Sky Pillar
at the very top of sky pillar
You can catch some at Sky Pillar.
The Sky PILLAR in Pokemon EMERALD is the same place it is in in Ruby and Sapphire
Spear Pillar is at the top of Mt. Coronet (Sky Pillar, where you catch Rayquaza in Pokemon Ruby, Sapphire, and Emerald, does not appear in Platinum).
sky pillar for claydol