No, it's impossible without using a cheating device.
You have to use the action replay to catch them.
You use an action replay.
arceus
You will need Action Replay for cheats.
You can't catch mew,only is you have action replay,or hack. If you have action replay you need a code to find it.
there is'nt an action replay code
To Catch Mewtwo You Need A Action Replay.
you need a action replay or a Pokemon event
you need action replay
Event Pokemon or Action Replay
You can catch Sinnoh Pokemon in Pokemon platinum, but you need to migrate and trade unless you have an action replay
You have to do a Nintendo event (they are on at certain countries) or use an action replay. You can buy an action replay for £15 at Argos. :)