by getting him traded from global terminal or transfer him from a past game
well you cant actually catch a third evolution Pokemon you first catch a slacoth then evolve it to slaking hope its usful the information
You can't.
No, you cannot.
its impossible without cheats
in a fossil
No, not without cheats. You can only catch Zekrom. -Kevin Seamus
I think you can catch 6 The Pokemon you can catch without cheats are: Palkia Girantina Cresselia Uxie Azelf Mesprit Heatran Rotom I forget the rest, but I know there's more!
its impossible without gameshark or action replay.
No it is not possible.
You don't.
You can't catch shiny legendary Pokemon without cheats... sorry
It is not possible to catch Mew is Pokémon Emerald version without using cheats. The only way to get it would be to trade.