What's up with Deoxys and his triangles? - PokéBase Pokémon Answers
Pokémon Emerald - Episode 63: Birth Island | Catching Deoxys (Mystery Gift) - YouTube
How to Get Deoxys in Pokémon Emerald: 8 Steps (with Pictures)
Dr. Lava on Twitter: "Birth Island Origins: Birth Island is based on Minami-Tori-shima, a strategic naval island the US and Japanese governments fought over for 100 years. The US took full control
Birth Island - Bulbapedia, the community-driven Pokémon encyclopedia