How to capture Deoxys
It made me
content 
"Attended an event and caught it quickly."
How I did it: Got an AuroraTicket in FR/LG & Emerald, and then went to Birth Island, figured out the puzzle and captured it pretty swiftly. Used one Ultra Ball for the first one and maybe 20 or so for the next one. Go to Birth Island well stocked
Lessons & tips: Use Ultra Balls.
Resources: The Pokémon Company's event. E-mail them for any advice on obtaining other in-game items.
