I was looking through the sprites from when people were first learning how to extract data from DP...
There are a few small glitches; Pokemon that have more than 1 form, such as Deoxys, Burmy, Cherrim, Shellos, and Gastrodon, use alternates for all their forms. Their base form uses a different palette. This was rectified when we got the locations for the alternates, but this opened a door to what I believe is a beta leftover. Take a look at this page I made, here.
The original link is down due to some error I am not sure of. I have reuploaded it here.