Shada was born in Boise, Idaho. He appeared as Thin Boy in Charlie's Angels: Full Throttle (2003), and as Nick Davis in the 2005 television movies Jane Doe: Vanishing Act, Jane Doe: Now You See It, Now You Don't, Jane Doe: Till Death Do Us Part, and Jane Doe: The Wrong Face. He has appeared in two episodes of Lost, and voiced Slightly in Tinker Bell and Comet in Space Chimps.
His brothers are actors Josh Shada and Jeremy Shada (who replaced Zack as the voice of Finn the Human on the Cartoon Network series Adventure Time).
Zack Shada indicated his interest in voicing the character Marshall Lee for the next gender-bent episode, but the voice director and Pendleton Ward had already chosen Donald Glover for the role. Notwithstanding, the creators have mentioned that they would like to bring the elder Shada back to the show for a future episode.
Spider-Man (TV Series) as
Hippo / Worker / Police Man 2 / ...
- Bring on the Bad Guys: Part One (2018) - Hippo / Worker / Police Man 2 (voice)
- Rise Above It All (2018) - Wake Rider #1 / Wake Rider #2 (voice)
Revenant (Short) as
Space Chimps 2: Zartog Strikes Back (Video) as
Batman: The Brave and the Bold (TV Series) as
- Sidekicks Assemble! (2010) - Aqualad (voice)
Grey's Anatomy (TV Series) as
- Goodbye (2009) - Andy Michaelson
- Good Mourning (2009) - Andy Michaelson
Random! Cartoons (TV Series short) as
- Adventure Time (2008) - Pen (voice)
Wizards of Waverly Place (TV Series) as
- Racing (2008) - Joey (as Zach Shada)
- Graphic Novel (2008) - Joey
- Smarty Pants (2008) - Joey (as Zach Shada)
Space Chimps as
Comet / Nava Boy (voice)
Jane Doe: Eye of the Beholder (TV Movie) as
Star and Stella Save the World (TV Movie) as
Brandon (as Zachary D. Shada)
The Batman (TV Series) as
- Ring Toss (2007) - Boy (voice, as Zach Shada)
Disney Princess Enchanted Tales: Follow Your Dreams (Video) as