The Jirachi in the post was a test in a save file from the Internet, later I got another Jirachi for my own save file, but I can't upload it now
Basically I used vbaM 1292 and Dolphin, in both I put their PAL Bios. I downloaded a Channel save file because I didn't want to wait 7 days. And in Dolphin selected as port 2 the GBA Rom and Jirachi was inyected into my save file
(Sorry for bad English)