Deoxys, an Uber that has four forms: Normal, Attack, Defence and Speed. In the 3rd gen, you could only get a sertine game. Attack-FireRed, Defence-LeafGreen, Speed-Emerald and Normal-Ruby and Sapphire. In D/P you can have any kind of Deoxys you want!
Put Deoxys in your party and go to Veilstone City. Go to the east of the city. There will be some craters with some Meteorites in them. Go up to one of them and press A. This should change your Deoxys form. Bellow is what Meteorite is what form:
Top: Speed Form
Middle: Normal Form
Bottom Left: Attack Form
Bottom Right: Defence Form
