Elite 4 Championship Battle Help

OK. I am at the champion batlle and need help. Here is my team and all their stats.

Empoleon
HP: 159/159
Item: Mystic Water
Lv. 52
Attack: 99
Defense: 119
Sp. Atk: 130
Sp. Def: 113
Speed: 101
Moves
Brine PP 8/10
Aqua Jet PP 17/20
BubbleBeam PP 17/20
Drill Peck PP 20/20

Staraptor
HP: 182/182
Item: Cleanse Tag
Lv. 55
Attack: 162
Defense: 93
Sp. Atk: 73
Sp. Def: 74
Speed: 148
Moves
Fly PP 7/15
Aerial Ace PP 9/20
Brave Bird PP 14/15
Close Combat PP 3/5

Palkia
HP: 175/175
Item: Lustrous Orb
Lv. 54
Attack: 142
Defense: 129
Sp. Atk: 176
Sp. Def: 144
Speed: 123
Moves
Dragon Claw PP 7/15
Water Pulse PP 5/20
Spacial Rend PP 3/5
Ancient Power PP 3/5

Deoxys
HP: 0/123 (I have plebty of revives and Max potions)
Item: Mind Plate
Lv. 52
Attack: 105
Defense: 112
Sp. Atk: 109
Sp. Def: 119
Speed: 200
Moves
Zap Cannon PP 1/5
Psycho Boost PP 1/5
Iron Defense PP 14/15
Extreme Speed PP 1/5

Rapidash
HP: 113/113
Item: Flame Plate
Lv. 42
Attack: 91
Defense: 73
Sp. Atk: 83
Sp. Def: 83
Speed: 109
Moves
Stomp PP 20/20
Fire Spin PP 15/15
Fire Blast PP 5/5
Fury Attack PP 20/20

Roselia
HP: 42/76
Item: None
Lv. 33
Attack: 40
Defense: 39
Sp. Atk: 71
Sp. Def: 71
Speed: 51
Moves
Giga Drain PP 9/10
Leech Seed PP 9/10
Magical Leaf PP 23/24
Toxic Spikes PP 18/20

I could really use some help winning so i can move on in my game.

Are any of those EV'd

What's EV'd?

Its a differ kind of Training

since i dont really know what that is i am going to say no.

thair kinda low level for the champion but ok

lead with roselia and set up t-spikes and leech seed then sweep some if your still avile.
than just keep switching into your opoment's weaknesses and kill them before they kill you. The toxic should give you some kind of advantage.

did you maybe give them some vitamins eg calcium , iron, etc?

i know there was another name for eveing i just can't remeber it!

and slow nice stategy might work except that milotoc took everything that wasn't a torterra and if he doesn't know what ev's are then he's not all that likely to know what a sweep is! but maybe he does and you've just told him the perfect strategy!

I would suggest to bring LOTS of Items and have at least one pokemon that is super effective against all of their pokemon, so bring lots of Max Revives and Max potions and Full Heals for inbetween the worst part is they're so unpredictable lol

um lenny i'm not trying to say your advice is crap but they are at they championship battle and can't get to the shops but that's exactly what i did at the championship battle but i nearly blew it on milotoc!

There is a shop right before you head into the official Elite 4 battling thing, just stock up before you go in.... and I'm right rofl there is a shop....

Yea, the counter on the right hand side b4 u enter sells stuff. SAVE constantly, every time u beat one of the elite four, before you go into the next room heal up yr pokemon and save the game, then if the next one beats you, switch off without saving and u don't have to start from the beginning again, and lose loads of money. Of course this won't help much if ur pokemon just aren't high level enough, but like everyone else said have plenty of max revives etc and sometimes u can spawn it! Otherwise u just gotta go away, be patient and level up some more (yawn)!