If you have a poke'mon with synchronize as an ability, you will encounter more poke'mon with the same nature as the poke'mon with sychronize. Note that the poke'mon with this ability must be in the front of your party.
The Pokemon ability Swarm has 2 effects. It raises Bug-type attacks by 150% when the user is weak, and, new to Emerald, it makes pokemon cry in the background more often. For example, in caves outside of battle, you will hear a Pokemon screech more often.
If you have a pokemon with the Static ability in the front of your party, it increases the chance of finding a wild electric type pokemon. This is EXTREMELY useful for finding rare electric types, like Pikachu in the Safari Zone.
To get Shedinja, you must first catch a Nincada, and have an empty space in your party. People say you need a Pokeball for it, but you do NOT. Shedinja copies the ball the Nincada was caught in. Anyways, with one empty space in your party, level up Nincada to level 20. It will evolve into Ninjask. When you check your party, you will see Shedinja sitting in the final slot, along with the Ninjask and 4 other Pokemon.
To unlock mystery gift, go to a pokemon mart and press A on the piece of paper on the counter. Then insert the words LINK TOGETHER WITH ALL. Press select to easily find the words. After this the store lady will talk to you and tell you that mystery gift is now unlocked.
Mirage Island is an invisble Island located on Route 130. Most of the time it will be invisible but on rare cases, the island will be visible. To find out if the island is there or not, go to Pacifidlog Town and talk to the old man in the bottom right house looking out the window. He will tell you wheter the island is there or not. The cause is unknown so a bit of luck is needed to find it. On the island you will find the rare Leichi Berry that powers up your Pokemon's attack in battle when it gets weak. In the grass, you will only find Wild Wynauts.
If you have a pokemon with the Magnet Pull ability in front of your party, it increases the chances of finding wild steel-type Pokemon. This is very useful for finding rare steel types, such as Mawile.
To do this you need an Everstone. To get one, search in Granite Cave for a lone rock on top of a plateau. Once you get an Everstone, let the a Ditto or a female Pokemon that you are breeding hold on to it. Once you receive and hatch the eggs, the offspring will have a 50% chance of inheriting the Nature from the Pokemon holding the Everstone.
In one of the treehouses in Fortree City is a man with a Wingull. Talk to the Wingull, and it will fly off out of the treehouse. When you get to Mossdeep City, you will see a person with a Wingull. Talk to it and it will fly off as well. Then go back to Fortree City and into the treehouse where you talked to the first Wingull. Talk to the man next to the Wingull, and he will give you the Mental Herb, and item which is a hold item that prevents attraction on the Pokemon that is holding it.
After beating the Elite Four, a new part of Meteor Falls opens up. It is in the northwestern corner where you found Iron Tail. A new cave was made and you'll find Steven in it. His Pokemon are in the high 70's.
To get the other Lati (Latios or Latias), Mix Records with a Pokemon Ruby/Sapphire game that used the Eon Ticket. You can then get to a hidden island via the SS Tidal where you can find the Lati you didn't choose.
After you defeat the Elite Four, go to your house and watch the television downstairs. After you watch it, your mom will ask you what color the Pokemon is. If you say Red, you will find Latias. If you say Blue, it will be Latios.
As you accomplish more along your journey, your Trainer Card will change colors and rise in rank, depending on completing certain tasks. After completing one task, it will rise in one rank, but there are some tasks that cannot be completed until beating the Elite Four. You must do these tasks:
-Become Pokemon league Champion -Complete the Hoenn Pokedex -Collect all the gold symbols in the Battle Frontier -Win one ribbon in all five of the Master Rank Pokemon Contests.
On Route 113, to the right of Fallobour Town, is house in which a man will make you items if you bring him ash. To collect ash, walk through the ash covered grass. Then bring it to the glass item maker.
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.
After you defeated the Elite Four, go to the Upgraded Safari Zone. In the Safari, you can catch some GSC Pokemon such as Houndour, Aipom, Stantler, Mareep, Miltank, and more GSC Pokemon. This Unlockable works only in Pokemon Emerald.