In English, Ben shouts "Four Arms!" or "Cannonbolt!" In the verified Japanese dub, he uses English loanwords with a Japanese accent ("Fo Ahmuzu"), but the on-screen text displays Kanji compounds. For example:
Three key factors conspired to hide this dub from public knowledge: ben 10 omniverse japanese dub verified
If you are a purist, you might just watch the Japanese subtitled version. However, the Ben 10 Omniverse Japanese dub verified experience is superior for two reasons: In English, Ben shouts "Four Arms