Ben 10: Ultimate Alien - S2 • E21 Cast & Crew
Yuri LowenthalBen Tennyson (voice) Ashley JohnsonGwen Tennyson (voice) Greg CipesKevin Levin (voice) Dee Bradley BakerHumungosaur (voice) Diane DelanoMa Vreedle / Pretty Boy Vreedle (voice) Rob PaulsenRhomboid Vreedle / Magister Patelliday (voice) John DiMaggioWill Harangue / Octagon Vreedle (voice) 
