HOW CAN I GET ALL THE LEGENDARY'S IN THE WORLD OF POKEMON ON A SINGLE GAME WITHOUT A ACTION REPLAY অথবা WEB SITE??

দ্বারা going to events for example the ones at game stop. অথবা just trading with people, and transferring some of them from the older games.
that's the only way to get them with out cheating.

Trading, transferring, and distributions at GameStop.

আপনি need to trade them all over if আপনি have them from পূর্ববর্তি games অথবা other people, অথবা get them from an event.