kill it or catch it
When there's Nurse Joy, say "Heal my Pokemon."
surf for a while and youll find it
after defeating or catching palkia, go to lake verity, lake acuity, and lake valor. use surf and go in the small island in the center of the lake. good luck!
you have to heal 10 Pokemon at the center yw
at lake valor. It's the lake directly below Veilstone. It's probably the easiest way if you don't mind meating some pokemon. Azelf will be in the cavern in the center of the lake. you'll need surf obviously. Azelf will be waiting for you in the center of the cavern.
There isn't a place called Lake Cavern, unless you meant the caverns in Lake Acuity, Lake Valor, and Lake Verity. Every lake has the cavern in the center of the lake and will have the trio inside in each when they have been released.
a lake in Pokemon
in each of the Pokemon lakes, after you have visited the spear pillar and found giratina go to the centre of each lake to catch mesprit, azelf and uxie. (Mesprit will wonder so you have to follow him)...^_^
in the lake
Pokemon lake is not an offical Nintendo game
in the snow place
Lake Okeechobee is the large lake located in the center of Florida.