By signing up for the psypoke forums, and posting this kind of thread in the right forum.
Quote:
If you require help regarding the site, chats or forums, post in here. Please do not post any Pokemon questions.
Anyway, the main site explains how to get Latios and Latias. Look here: http://www.psypokes.com/rs/legendaries.php for information on all the legendaries.
If you need anymore help on this subject, please sign up for the forums, and post questions where they belong.
Edit: Emphases on signing up and posting questions where they belong. You keep making topics about legendaries in the Help forum, but the link I posted explains where to get them. :