Choose the name of Ben's aliens that debut in the show "Ben 10" (2005), throughout any of the 4 seasons. There are 22 Correct answers and 23 wrong ones. YOU HAVE 1 LIFE.
Source: https://ben10.fandom.com/wiki/Category:Transformations#Ben_Prime's_Aliens
This Sudden Death DOES include the debut Aliens future versions of Ben transforms into, in the scenes set in the future. (If there are any.)