Although the voices of the fighters are uncredited in-game, Nintendo has confirmed the majority of them through the official ARMS Twitter account:

• Peter Von Gomm voices Spring Man (and by extension Springtron).
• Momoka Kawasaki voices Ribbon Girl.
• Kenji Takahashi voices Ninjara.
• Kouji Takeda voices Master Mummy.
• Haruna Takatsu voices Min Min.
• Ayumi Fujimura voices Mechanica.
• Adeyto voices Twintelle.
• Ryouta Takeuchi voices Kid Cobra.
• Dominic Allen voices Max Brass.
• Soness Stevens voices Lola Pop.
• Toru Sakurai voices Misango.
• Donna Burke voices Dr. Coyle.

The remaining two fighters, Helix and Byte & Barq, are the only ones to have unknown voice actors. Coincidentally, they are also the only fully original non-human fighters.