Solve the puzzle and catch deoxys
The triangle puzzle is on birth island and only accsessible by teleport code or The Aura ticket, And if you solve the puzzle , you get a chance to get deoxys
Surf from dewford to petalburg there is a giant rock between them get in there and solve the puzzle and you will find him
get the ticket to birth island and solve the puzzle. You can only get the ticket from a Nintendo event or cheating.
In Pokemon Emerald to solve the Sealed Chamber puzzle you need to put Wailord at the top of your party. Relicanth needs to be at the bottom of your party. This order is the reverse of the order needed in Pokemon Ruby and Sapphire.
To awaken Regigigas you need to migrate from Ruby/Sapphire/Emerald the three Regis.
go to puzzle in sky pillar
Solve the puzzle of the Sealed Chamber then go into the secret caves around hoenn solve the puzzle in each cave to reach Regirock, Registeel or Regice.
http://www.youtube.com/watch?v=FY9RBdKja38
The prize for the 2nd puzzle in the Trick House on Pokemon Emerald is a Timer Ball. To access the 2nd puzzle of the Trick House you need the Dynamo Badge from Wattson in Mauville City.
In one of the tanoby chambers. You have to solve the puzzle in the tanoby key which is in the grassy area of the sevault canyon NOT the canyon entrance. You need a Pokemon with strength to solve the puzzle.
solve your question by going to http://www.pokemondb.co.uk/evolution