Board Thread:General Discussion/@comment-25417189-20150825221139/@comment-25582553-20150827223717

Now that you mention it, there are still at least twenty aliens Ben unlocked that we don't know about. This is true because Ben did say he had sixty three aliens in his arsenal as of The Flame Keepers' Circle. At the time, we have only seen thirty nine aliens on camera. The addition of the aliens he unlocked when he was 11 (Spitter and Arctiguana (Feedback was removed by Malware and doesn't count)) and the aliens used in the Asian play (Rocks and Squidstrictor) totals the amount to forty three. And with proper subtraction of sixty three by forty three, we can conclude that at the time Ben still has twenty aliens that he unlocked that we currently have no information about. In the beginning I said "at least twenty" because there is still a chance Ben unlocked more unseen aliens afterwards.