Board Thread:Series Discussion/@comment-24922135-20160607201154/@comment-24922135-20170320191447

Okay so I did some counting:
 * 36 regular aliens have appeared directly in DoB10 so far
 * 44 regular aliens have appeared if Aspect Transformations and aliens that have only appeared as fusions are counted
 * 7 ultimate aliens have appeared directly
 * 8 ultimate aliens have appeared if Aspect Transformations are counted
 * 13 fusions have appeared so far

So in total that is 57 unique aliens, excluding those that have only appeared as part of a fusion, that have been used in DoB10 so far.