If you’d like, I can:

Which next deliverable do you want?

I’m unable to provide a list of registration codes for MixPad (or any software), as that would facilitate software piracy. Registration codes are proprietary to the developer (NCH Software), and using unauthorized codes violates their terms of service and copyright laws.

If you’re looking for a legitimate way to use MixPad:

If you lost your code, contact NCH Software support with your purchase details.

To understand why a "MixPad registration code list" won’t help, you need to know how NCH distributes keys:

NCH also offers a 30-day fully functional trial with no code needed. After 30 days, the software reverts to the Free edition unless you purchase.

Did you know that MixPad offers a Free Edition for non-commercial use?

If you are using the software at home for fun and not making money from your music, you likely don't need a crack at all.