Set in the Oore Region, the game starts showing Yourself, Leo break into Team Snatch's Headquarters and steal one of the Snatch Machines. This act causes Team Snatch to have to go into hiding

In the Oore Region, there are no wild Pokémon so Pokéballs are really hard to come by as, evidently are Wild Pokémon. You begin with Espeon (Lv. 25_ and Umbreon (Lv. 26).
A Short time after the game starts, you find your partner...Mirei who is being kidnapped by Team Shadow because she can sense the Dark Essence in some of the Pokémon Team Shadow Use, so you two agree to save these Evil Pokémon from their trainers

To do this, you must try and fact Team Shadow and stop them trying to stop you from healing the Dark Pokémon

When you catch Dark Pokémon They have 5 Purple Status Bars...these show the amount of darkness that the Pokémon has. When it's fully dark it only has the following attack but it gains attacks as you slowly heal...however when all 5 bards are gone, your Pokémon is still dark. You need to go to the Shrine in Ageto Town after that and your Pokémon shall be healed and will get all EXP earned as you healed them. You can also rename them when its healed. They also get a ribbon showing that they have healed from their evilness. Gender Chances are as random as Wild Pokémon

Dark Pokémon may enter a Hyper State which causes them to only use Dark Rush and it's Critical Hit Ratio will be a lot higher. To Calm it down you need to us the command Call Out. This will also help heal your Pokémon There are multiple ways to heal the Pokémon from Darkness and here a few are:

• Keeping them in your team of 6
  
• Using them in Battle
  
• Place them in Daycare
  
• 'Calling Out' to them (See Below)
  
• Giving them a Cologne Massage

In this game, you need to complete it before you can trade with Pokémon Ruby/Sapphire/Fire Red/Leaf Green and you can only save when using PCs.
There are also some Pokémon that you can only get after going through the game again and again which would require trading later on...or a lot of time.

In battle, instead of the command Run (with Attack, Pokémon and Items) You have the command called Call Out, this will make your Dark Pokémon come Out of Hyper State which will help lower the Dark Bar. It also helps Awaken Sleeping Pokémon

More Soon...