Board Thread:General Discussion/@comment-8335247-20131201003145/@comment-24145588-20140223174305

If you look at the resource files, there are two (slightly) different sheets for the Wubbox art, monster_WUB_sheet.png and monster_WUB_COLD_sheet.png. The difference between them is, as Hewy said, in the color of some of the blues. So the ones on the Cold Island are probably using the second sheet (not a Wubbox breeder, so I can't check for myself).

Guessing that these differences would carry over to the Gold Island, but don't know for sure.