Deoxys is a Psychic-type Pokmon introduced in the third generation of the Pokmon video game series. It is a powerful Pokmon with a unique ability to change its form. Deoxys can be obtained in Pokmon Emerald by completing a special event.
The Deoxys event in Pokmon Emerald is triggered by talking to Steven Stone in the Mossdeep Space Center. Steven will give the player a Meteorite, which can be used to summon Deoxys. Deoxys will appear at the Abandoned Ship in Route 109.