Suggestions by @user_332413
22 suggestions
Ian Hecox
as Toby Fox in The Undertale Movie
Richard Steven Horvitz
as Gaster Blaster in The Undertale Movie
Jason Mantzoukas
as W.D. Gaster in The Undertale Movie
John Cena
as Asgore in The Undertale Movie
Mila Kunis
as Alphys in The Undertale Movie
Anya Taylor-Joy
as Undyne in The Undertale Movie
Taylor Russell
as Chara in The Undertale Movie
Javier Bardem
as Flowey in The Undertale Movie
RuPaul
as Mettaton in The Undertale Movie
Chris Pratt
as Papyrus in The Undertale Movie
Octavia Spencer
as Toriel in The Undertale Movie
Arnold Schwarzenegger
as Greater Dog in The Undertale Movie
Mia Goth
as Muffet in The Undertale Movie
Timothée Chalamet
as Asriel in The Undertale Movie
Awkwafina
as Temmie in The Undertale Movie
Jack Black
as Sans in The Undertale Movie
Jenna Ortega
as Frisk in The Undertale Movie
Matthew Fogel
as Writer in The Undertale Movie
Trent Reznor
as Composer in The Undertale Movie
Christopher Nolan
as Director in The Undertale Movie