Click to find out=>
Konohamaru (Grandson of Sandaime/Third Hokage)
Udon & Moegi (I'm not sure of their names but their Konohamaru's friends the boy is Udon and the girl is Moegi)
Proof: I watched this Ben 10 ep.!!!
Pls. also see this thread: http://www.animeforum.com/showthread...66#post2268666