You cheat or trade from a guy who cheated.
With an event you can get deoxsys here
I don't think you can but if you have Deoxsys on Pokemon fire red leaf green or ruby/sapphire emerald then you can transfer it to your Diamond
after beating league champion, compliting first pokedex (not jirachi and deoxsys) then random in woods.
you wait until the rocket launch is at exactly 50 then the guy will send you onto the moon
no u cant buy masterballs in any of the Pokemon games except with cheats may b
if you have vba emulator go to www.doperoms.com use next words: Pokemon psychic(sapphire hack) there is three starter pokemons lugia mewtwo and deoxsys. and more legends in rout 103.
Deoxys is not a Pokemon you will be able to capture in this game. As far as I know you could only get it in the GBA games through mystery gift. If you did happen to get that mystery gift, then you can transfer it through pal park.
Technically, you can get them in the games that are the region it came out in and the ones before it by trading. I am not sure which region it came out in. Sorry about this inconvenience. If you have any other questions, about pokemon, if I can answer them, I will unless someone does before me. Then I will most likely improve them.
Assuming you failed trying to get it the first time in the delta episode. You can re battle the elite four go back to the top of sky pillar and a triangle will be others click it and deoxys will appear
legedaries: 1.darkrai 2.arceas 3.ho-oh 4.mewtwo 5.rayquazza 6.deoxsys regular: 1.empoleon 2.garchomp 3.gyrados 4.dragonite 5.staraptor 6.Palkia, Dialga, giratina (depending on the game
A... d..d..DEOXSYS!? Sure!Name: LamboCode:Date: Sun. Nov 8th 2009Time: 11:30 AMWhat is your name in the game?!