Board Thread:General Discussion/@comment-24922135-20171016210714/@comment-24922135-20171017213416

Upgrade is the only alien that has appeared in/is confirmed for the reboot who does not currently have an enhanced form at all, excluding Gax, Rath, and the new guy.

The other two that we only recently learnt about having enhanced forms are XLR8 and Stinkfly. Stinkfly can fire magic missile-type blasts from his mouth, and XLR8 has wheels on his heels (like that guy from Big Hero 6).