Board Thread:General Discussion/@comment-27589390-20160117024551

I think Ultimate Upgrade should be the Mechamorph armor in Destroy All Aliens.

Ultimate Ghostfreak should be Z'skayr's form, but it won't turn Ben evil.

And Ultimate Heatblast should be a dragon with an iron chestplate, with fiery wings on the back.

But Ultimate Alien ended, so I was too late to suggest these. 