here you go http://cheats.gbatemp.net/files/12_08_09_CHEAT.DAT.zip (If you're smart bookmark the site for in the future the site gets frequently updates)
or you could try my ones.. (http://cid-cd571e83afda92b6.skydrive.live.com/browse.aspx/cheat%20files%20%5E5NDS%5E6)
The problem is there is a bug in the R4 firmware (I guess you have an R4) where it can only see a few of the cheats in the list. You need to remove some of the cheats you don't want, or move the ones you do want up to the top of the list. To do that, you need Yasu's R4CCE http://hp.vector.co.jp/authors/VA013928/soft_en.html
Read the Common Issues on cheats not appearing. https://www.romulation.org/forum/index.php?topic=1462.0