Instant Egg in Daycare Code?

Just wondering, does anyone happen to have an AR code to get an egg in Daycare instantly? I know there definately is one cos I used it before, but I cleverly managed to clear out my entire cartridge I've tried a couple but they give you an egg with every step you take. The one I was using before gave you an egg if you held L+R and THEN took a step. I just can't seem to find it again... Also, there are different codes for every region aren't there? So if anyone has the code I'm rambling about, could it be for the UK Action Replay please, for Diamond version?

Thanks a bunch!!