Suggestions by @matthewsuckstorf

Frank Welker

as Goddard in The Loud House featuring Nicktoons: Multiverse Madness!

Dee Bradley Baker

as Momo in The Loud House featuring Nicktoons: Multiverse Madness!

Mae Whitman

as Katara in The Loud House featuring Nicktoons: Multiverse Madness!

Jack De Sena

as Sokka in The Loud House featuring Nicktoons: Multiverse Madness!

Rickey D'Shon Collins

as Tucker Foley in The Loud House featuring Nicktoons: Multiverse Madness!

Grey DeLisle

as Sam Manson in The Loud House featuring Nicktoons: Multiverse Madness!

David Kaufman

as Danny Fenton in The Loud House featuring Nicktoons: Multiverse Madness!

Janice Kawaye

as Jenny Wakeman in The Loud House featuring Nicktoons: Multiverse Madness!

Jeffrey Garcia

as Sheen Estevez in The Loud House featuring Nicktoons: Multiverse Madness!

Rob Paulsen

as Carl Wheezer in The Loud House featuring Nicktoons: Multiverse Madness!

Debi Derryberry

as Jimmy Neutron in The Loud House featuring Nicktoons: Multiverse Madness!

Rosearik Rikki Simons

as GIR in The Loud House featuring Nicktoons: Multiverse Madness!

Richard Steven Horvitz

as Invader Zim in The Loud House featuring Nicktoons: Multiverse Madness!

Flea

as Donnie Thornberry in The Loud House featuring Nicktoons: Multiverse Madness!

Tom Kane

as Darwin in The Loud House featuring Nicktoons: Multiverse Madness!

Lacey Chabert

as Eliza Thornberry in The Loud House featuring Nicktoons: Multiverse Madness!

Carlos Alazraqui

as Winslow in The Loud House featuring Nicktoons: Multiverse Madness!

Tom Kenny

as Dog in The Loud House featuring Nicktoons: Multiverse Madness!

Jim Cummings

as Cat in The Loud House featuring Nicktoons: Multiverse Madness!

Richard Steven Horvitz

as Daggett Doofus Beaver in The Loud House featuring Nicktoons: Multiverse Madness!