Not sure which one you are referring to, but here are some hints/cheats...
+ Trading
When you trade when it says SAVING DONT TUN OFF POWER after the trade after it is done turn it off straight away you will both have the Pokemon it works
9 out of 10 times it will work
+ Train POKEMON TO LV HUNDRED
Please rate me.. all you have to do is go to a daycare leave it there and get busy with something else like beat the elite four, train Pokemon , when it grows to Lv 50 take it to the elite four and make sure you give it an Exp share make it 70 then for my cheat mohahahahhaha THen give it the exp share while it's battling in the elite four so it can get double exp points ^_^!!! Then when it's hundred SAVE then say Few
And make your whole party hundreds
+ Rare colour
Has anyone caught a rare coloured pokemon? If not look on the water around pacifficlog town and if your lucky you will find a rare coloured magicarp. My one was yellow.
+ Safarizone cheat
Press a b up down right select at the same time it does work I tried!!!
+ Emerald Secrets
Mirage Island Berries:
On Mirage Island, there are these berries that you can only get there. Take that one berry and plant it somewhere else, because you may not come back in a really long time.
Unlock the 3 Regis':
Place Wailord at the position of your first Pokemon, and Relicanth as your last Pokemon, then reenter the innermost chamber. "Desert Ruins", "Ancient Tomb", and "island Cave" will then finally have opennings. There will be more Braille writing. I forgot what it said though, sorry.
Get Rayquaza:
Go to the Sky Pillar that Wallace mentioned. Then reach the interior and go to the top. Rayquaza will flee to Cave of Origin (At least I think). Then when you get to Rayquaza, he'll flee again back to Sky Pillar. Enter the Sky Pillar, but just to tell you, from when he fleed, there was a huge earthquake that made so many cracks, and rocks appear. So you'll need the Mach Bike to navigate them all. Just reach the top and battle, and catch.
Double Trouble:
Be careful when two trainers are facing each other. If you go into the middle of them you might have to battle both. Try just going in front of one of them and you might be able to avoid. Some other trainers like Team Magma await you to climb a staircase, when one waits horizontally to it, and the other faces vertically to it. Those are unavoidable.
Mirage Tower:
Exploring the desert might let you be able to enter Mirage Tower. Navigate the cracks with the Mach Bike and reach the top. Use Rock Smash to break the rock and take one of the fossils. If you want the other one, go to the Fossil Maniac's house and enter the Desert Underpass. Take the fossil there, that'll be the other one that you didn't get.
+ Lots of money
Interviewer Gaby & TY. They give you around 7000 with the Amulet Coin. They only go in route: 111, 118(across the water) and 120 IN THAT ORDER!
P.s: to get the AC, defeat petalburg gym leader and talk to mum
+ Grow your Pokemon up to lv 100 without a gameshark or action rep
Well get a acro bike and put the two Pokemon you want growing to lv 100 in the day care then above the sandstorm theres this muddy hill you can't get up it can you.
Now this is the good part put your game boy advance on charge or put new batteries in.
Now get some object like the corner of a tv or a book to keep the up button up.
Make sure you just keep going up the mud hill and back down if you go up youve got the wrong bike.
Leave it overnight
Then you go get your Pokemon out the daycare and they should be goddamm high.
It also works for breeding to.
+ Infinite safari steps of some sort
Go to the place you want to go and get on the bike that bounces. Bounce. Pokemon will attack! Have Fun! :]
P.S. You are wasting steps but thats why I said " of some sort. "
P.SS Some girl says "If I don't get any Pokemon I will wast my safari time." or something like that. She's not taking any steps!
+ To get past traniers without a battle
When they look away walk I repeat walk by them,running draws there atention
+ How to get shedinja
Ok go to rustboro city and catch a nincada and have only five Pokemon with you including the nicada leave one empty space in your party.it dosent have to a Pokemon ball.now raise nincada up to level 20 and it will evole to ninjask.in the empty space will be shedinja.have with your new wonder guard.i think this Pokemon will be useful at the battle fontrier.i hope I helped.
+ Get a girl starter
Now, this cheat may take some time but it is definitly worth while! Now to get a girl starter keep starting your game over until you get a girl starter! It may take about ten or more tries but keep doing it and you will get a girl starter!
+ Fishing rods
To get the old rod, go to dewford town and talk to the fisherman near the gym. He will give you a old rod. To get good rod, talk to the fisherman on route 118, east of mauville city. You must need surf to reach him. Talk to him and you will get good rod.
To get super rod, go to mossdeep city and go north of the space center and go into the house. The man inside will give you super rod.
+ Ez Way To Get POKEMON!!!
Ok I found a REALLY good way to get the pokemon.Ok when you find the Pokemon that you wun't throw the pokeball (it works with all the balls to but back to the point)when the ball get to the Pokemon it will bouns 4 time so press down 4 time along with it and then it will go right,left,right go along like right left right at the same time.It Really works.(works like 90% of the time but it's worth it.)
+ Easy pokerus
Just put in catch trainers Pokemon and have 1 space in your team open the bad egg will have it and it will spread to your other Pokemon in your team.
P.S. This only works for AR
+ No safari steps
Go to the area you want to catch Pokemon at and tap the D-pad so your character just turns the other direction. It won't take any steps and Pokemon will apper as you turn.
+ A Little Help...
Firstly, for all of you that think that anything without a gender cannot breed...well, 3 Pokemon can breed and they have no gender. They are Beldum, Metang and Metagross. They can only breed with a Ditto though.
Secondly, a lot of you think that you can breed Latias and Latios, and some of you think they have no gender. But they do. Latias is a girl and Latios is a boy. But don't try breeding them because they don't breed. Not even with Ditto. They are exactly like any other legendary, and they only have genders because they are brother and sister.
Lastly, this isn't much but if you want a female starter, then save your game by Prof Birches bag and turn the gameboy off and then on again every time the Pokemon is male. This doesn't work with the Pokemon lotto corner, or egg hatching.
+ Stealing Pokemon from the battle Factory with gameshark
Some of you may know about this but some don’t.
In your options make sure your LR nutton are set to LR
I just found out how to steal many awesome Pokemon from the battle factory…
First go to the Pokemon center in the battle frontier..
Remove all Pokemon except one. This Pokemon is going to be lost forever so make sure it is a random lo level Pokemon you don’t care about.
Save the game
Load up your game with the following game shark codes….
[M]
9266FA6C97BD
905B5ED35F81
B76A68E5FAB1
Easy win trainer single battle
D2201D237C06
DD3B48F5DE3F
Warp to Petalburg city (hold L when entering or exiting a building to activate this code)
19C67C656689
12B9BF135649
After turning the game back on with these codes enabled…
Go to the battle factory… It has to be the battle factory the yellowish building with the brown windows…
Go to the counter on the right and enter a single battle
Open level will get you level 100 pokemon!!
Choose the three Pokemon you want then start the battle
Everytime you win you can switch up a Pokemon.
or see if there is anything better
Make sure to keep the ones you want. They will be soon yours..
you dont even have to really win these battles either because the easy win means you pick one attack and hten you automatically win the match.
When you win the 7th battle you will see it go back to the place where you meet the person you are battling during that split second (timing must be precise) activate the warp to petalburg city code by pressing and holdiong the L button…
You will be whisked off to petalburg and in your party will be the three Pokemon you had. YOU HAVE TO DO THE NEXT STEP…..
Next go to the Pokemon center in petalburg city deposit the Pokemon and get another one out that you don’t want…
SAVE THE GAME AND TURN IT OFF
Load up the game with the following gameshark codes
[M]
9266FA6C97BD
905B5ED35F81
B76A68E5FAB1
Battle Frontier warp by pressing and holding L while going in / out a door
19C67C656689
94318B106757
Warp back to the battle frontier by going in/out a door and holding L
Save and turn off….
Load without any codes…
Go back to the battle factory as you walk in the door you are greeted as a winner the gane saves and you don’t get your 1 Pokemon back but you have gained three and I've seen some legendaries in there and rares and they have held items and are level 100 if you picked open level
They don’t register in the pokedex so trade them and then trade them back and they will…
Ive gotten a bunch of hell of rare stuff this way
+ How to get Mew
To get Mew you have to go to Faraway island. To get there you need a special ticket called the old sea map. Once you get there head deep into the forest. Youll spot Mew and he will dash off into the grass.
He will hide from you and you will have to corner him. Corner him and youll go into battle with a lv. 30 Mew. This works I've tried and I caught Mew with a masterball so use a masterball if you still have it.