* ApprovalofGod: Derrick Wyatt, art director for ''Ben 10: Omniverse'', generally holds low opinions of both ''Ben 10: Ultimate Alien'' and ''Generator Rex''. Yet he admitted the crossover was "better than expected," calling it "fun."
* HeyItsThatVoice: All of Ben's aliens (bar [[Creator/JohnDiMaggio Rath]] and [[Creator/YuriLowenthal Upgrade]]) are voiced by Creator/DeeBradleyBaker, except for the new guy, Shocksquatch, who's voiced by Creator/DavidKaye. Alpha is voiced by Creator/MichaelEmerson.