You'll firstly need to catch Landorus, to encoutner him you'll need to accumulate 3200 orbs firstly. Then Part 2>>
Insert Pokémon Pearl and select Pokemon Dream Radar. Select ''Start'' from the start of the screen with Pearl.
Access costfor the level:- 0 bulbs
You'll be encountering Stormy Dream Clouds so bring everything with you to catch this beast!
source = HERE + Experience. :)