Attack. CB Deoxys is great in uber battles...

I prefer Speed version better, because it has pretty good Attack and Defense, with the highest Speed in existance.

I'm very fond of Attack Deoxys, but I like all of them, really

All it has is speed, no deffense, and only a tiny bit of attack.
In fact, Smogon is considering removing speed deoxys from uber, and putting it into the standard metagame.

The Speed form is really cool.

Attack Deoxys is my preferred form. Looks cool, and it battles well. You don't get many pokemon like that...aside from Dragonite...and Salamence...and a few others...

My personal favorite is defence deoxys; cosmic power, recover and spikes are good. But attack deoxys is the best, with CB/superpower and psycho boost. It can totally sweep an unprepared team.

Try this if you ever do uber....

Deoxys FR @Choice Band
~Extremespeed
~Shadow Ball
~SuperPower
~Psycho Boost

Shadow Ball for the metagross (they run rampant, and it is typically preffered to not switch out of a metagross, as they do have pursuit) and Lati@s, Extreme speed for everything else. T-tar is dead to superpower. Psycho Boost isn't used that much, simply because evrything resists it (Mew[two], Soul Dew Lati@s, Celebi, Lugia, etc.)

Well attack Deoxys but i really like all of them

'Gotta love the ALIEN POKEMON!!'

Deoxys is ugly and too über.

Attack Deoxys is the best by far. Speed looks the coolest though.

My favorite form of Deoxys is Attack because of it's moves and it looks cool Defense form is alright with it's Defense stats it is basically a big wall,as for speed I could really care less because of it's Att and Def.

Pretty simple, you send Attack deoxys out- kill the pokemon- switch out.

In fact it is such an amazing pokemon that many metagross use pirsuit in their moveset just to counter it. And people are considering banning it.

It doesn´t matter how low the defences are when the idea is not to get hitted.

By the way, almost any pokemon use a first strike attack? the only one is extreme speed rayquaza.

or extreme speed arcanine. sometimes linoone.

as for the various forms, every team should have a good counter to all of them. if i see an attack deoxys i just send out a high defence pokemon - it only needs to survive the switch and one more hit to deliver a single blow. same with normal and speed. i think the only useful form is defence. but it can be taken down so easily by blissey (thunderwave or toxic, seismic toss,....), leech seed, sandstorm helps, haze, roar etc, because it cant do much in the way of attacking you back. it is good for pressure stalling though, and if no-one on your team has any of the above moves, you could find it just becomes a sponge and you use up all your attacks.

i voted for "lol deoxys". it is an example of a pokemon with so much emphasis on one thing it lost out on everything else. eg metagross is awesome since it has sky high atack, but also excellent defence.

Overall I prefer the Attack form of Deoxys. It looks cool and is alright in battle, I guess.

I agree with charizardruler attack is the best but speed looks awesome

I like speed the best cuz of
1. Great speed duh
2. Above average in all other stats
3. looks the best

Well at least put this somewhere where there aren't a bunch of Deoxys fans... Not to be rude, or anything, but this comment Depressed me

As Cuddles said before, there are also Extremespeed Arcanine and Linoone.

But y´know, there is something in this universe called "Quick Attack" and even a Flygon, Absol, Raichu, Zangoose, [Insert poke with +70 attack here], etc. that uses Quick Attack can take Aggresive Deoxys down, and even more now since there are tons of first-strike moves, like Aqua Jet, Shadow Strike, Ice Pebble, etc.

On topic, I agree with IluvPidgeot&TheGatr <--(O.o) about Speed Deoxys, because IMO its the most balanced.

ATTACK! because i never have given my pokemon a defense move EVER and i like attacking stuff...

Yes, but I was talking about uber metagame, wich is where you see attack deoxys.