Damn, congrats.
A funny story this reminds me of.
So me & a friend were using a Gameshark & were trying to see if this Shiny code worked or not & this is Fire Red btw, but we hacked a ticket to Birth Island & what better way to test the code then on a Legendary Pokemon.
So I tried the code encountering Deoxys & it didn't work the first time, the second time it freezed, & the third time it worked!! I attempted to catch it but I failed & it ended up killing itself..
So I tried the code again & it didn't work...... I tried again & again & again & no Shiny Deoxys so then me & my friend looked at each other in shock, realizing I encountered a LEGIT Shiny DEOXYS!!
I couldn't believe it... I was soo sad..
I encountered a Shiny Unown & caught it though..