I was looking for this for a bit before I just pulled it off myself. I saw other threads requesting cute charm glitch files, so here you go. This is for Pearl. Pretty sure it won't work for Platinum. Might work for Diamond, I'm not too familiar with that, someone else might be.
I pulled this off on DesmuMe. After conjuring it up, I injected it into my cartridge, and it seems to work perfectly fine. My first shiny was a Kricketot, second was a Starly, and so on.
Details:
Trainer name: Dawn
Gender: Female
TID: 20101
No badges. Save is right after the assistant gives you pokeballs.
Male lead. Equipped with a cute charm Delcatty in the first party spot. You're the OT, feel free to rename him. He's not legit tho. Just so you know. He's legal, just not legit.
cutecharmglitch.sav