I know that with an earlier iteration of the kwami surprise boxes there were codes that could indicate which kwami was inside.

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While the codes for the 'Glitter Chase Figures' aren't the same as they were before, there are, however, some code differences on the bottom of the boxes to narrow down which kwami you might get. So far, I know of three different codes and which ones go to 15 of the 18 possible kwamis you can get with these. Neither I nor my sister have gotten Pollen, Trixx, or Nooroo, so I don't know what the codes for those may be. UPDATE: Sadly, I discovered that the codes are completely random. Unlike the earlier iterations, it appears there really is no way to narrow down the search.