No you can't get deoxys without action replay
It's an event pokemon so you can get it through an event or hacking (using pokesav to activate the event). Once you activate it, go to any pokemart and talk to a guy in a valet-looking uniform. Make sure you have a space left in your party and he'll give you a Deoxys. You can then go to Veilstone and use the meteors in the craters to change Deoxys' form.
You have to cheat to get Deoxys in Pokemon Platinum.
You can only pal park from emerald, sapphire, ruby, or use GTS
Go to veilstone city and you will see meteors and they will say it upgraded a pokemon to your pokedex and then you have to complete the national Pokedex and then the next time you go to it deoxys will pop up at you
Actually if you have pokemon sapphire/ruby and caught him/her and you have the national dex you can get loser's what you have to do is insert pokemon sapphire and pokemon platinum/diamond/pearl and go to pal park [the place you find sudowoodos] and speak to the bloke that's blocking the counter [you must click on migrate from pokemon ruby/sapphire first and have six of the pokemon you migrated] and I think he wil let you in [sorry if this was mostly on how to get into pal park than to actually get him] oh don't forget to catch him[or at least see him] OK DOKAY NOOBSSSSSSSSSSSSSSS
You can't,only you can catch it in diamond or pearl
You can not unless using cheat
You have to go 2 veilstone city and check the
metres and whop!!!
metres and whop!!!
You have to see every pokemon in the game and then go to trophy garden use max repel and walk around youll find it that way other people tell you crap
Go to the first floor of the jublife rv house or something. You see a prof WHO gives you something app's if you take that one of them you see black skull's on the pokemon app map. Walk in to it it are legendary pokemons and so I found deoxys
You can't catch Deoxys in Pokemon Platinum. You can use an Action Replay to get Deoxys, though.