The only three English voice actors from Star Fox Assault's western dub to reprise their respective roles in Super Smash Bros. Brawl's Lylat Cruise conversations were:

• Jim Walker as Fox McCloud
• Alesia Glidewell as Krystal
• Mike McAuliffe as Slippy Toad

All the other characters were recasted:

• Falco Lombardi, now voiced by Dex Manley (originally Mike Madeoy)
• Wolf O'Donnell, now voiced by Jay Ward (originally Grant Goodeve)
• Peppy Hare, also now voiced by Dex Manley (originally Henry Dardenne)
• Leon Powalski, now voiced by Jim Walker (originally David Scully)
• Panther Caroso, now voiced by Eric Newsome (also originally David Scully)

This is not the case in the Japanese version of Super Smash Bros. Brawl, where literally of the Japanese voice cast from Assault, that also heavily comprised of returning voice actors from Star Fox 64, reprised their roles. More specifically, Kenji Nojima, Hisao Egawa, Kyoko Tongu, Tomohisa Aso, Teiya Ichiryusai, Mahito Ōba, Shinobu Satouchi and Tetsu Inada reprising their roles Fox, Falco, Peppy, Slippy, Krystal, Wolf, Leon and Panther respectively.