Well, somehow it didn't work. Do I need to give the player the Auroraticket with this to work?
I've even tried (and then restored the backup after) deleting the level scripts from Birth Island, then creating a new level script with a clean "clearflag 0x2FC" (which is the usual flag for Deoxys), and still no results.
I'm using warps to go to the place, maybe there is the problem (?)
edit: if I use the GS code (4A99A22B 58284D2D), it works smoothly, but not within my warp (and yes, i've toyed a bit with that warp)