Agent Zero is the pseudonym of an American voice actor who worked primarily with the 4Kids Entertainment company on English-language anime dubs. The actor is also known professionally as Tony Salerno, as well as Anthony Salerno and Anthony Haden Salerno.

Agent Zero is recognized for performing the roles of both the Narrator and the character Shibazaki in the English dub of the anime series Ping Pong Club. This series, which originally aired in 1995, featured a cast using various pseudonyms, with Agent Zero being one such credit.

Beyond this work, the actor has notable credits in the English adaptations of the Yu-Gi-Oh! franchise under his legal name, Tony Salerno. He provided the voice for Rex Raptor in the second series anime beginning with episode 188. He also voiced the character Chazz Princeton in Yu-Gi-Oh! GX, a role he held for 89 episodes. In addition to voice acting, Tony Salerno has also worked as an ADR director and scriptwriter on various anime productions.

No information is available regarding recurring collaborations with other specific industry professionals or a list of major awards and notable achievements for Agent Zero.