Suggestions by @firemongoose

Frank Welker

as Garfield in Nickelodeon Kart Racers 4

Score: +1

Alanna Ubach

as El Tigre in Nickelodeon Kart Racers 4

Score: +1

Candi Milo

as Snap in Nickelodeon Kart Racers 4

Score: +1

Janice Kawaye

as Jenny Wakeman/X-J9 in Nickelodeon Kart Racers 4

Score: +1

Susanne Blakeslee

as Wanda in Nickelodeon Kart Racers 4

Score: +1

Daran Norris

as Cosmo in Nickelodeon Kart Racers 4

Score: +1

Tara Strong

as Timmy Turner in Nickelodeon Kart Racers 4

Score: +1

Tom Kenny

as DogCat in Nickelodeon Kart Racers 4

Score: +1

Jim Cummings

as CatDog in Nickelodeon Kart Racers 4

Score: +1

Carlos Alazraqui

as Rocko in Nickelodeon Kart Racers 4

Score: +1

Rosearik Rikki Simons

as Gir in Nickelodeon Kart Racers 4

Score: +1

Richard Steven Horvitz

as Zim in Nickelodeon Kart Racers 4

Score: +1

Francesca Marie Smith

as Helga Pataki in Nickelodeon Kart Racers 4

Score: +1

Grayson Eddey

as Arnold Shortman in Nickelodeon Kart Racers 4

Score: +1

Fred Tatasciore

as Reptar in Nickelodeon Kart Racers 4

Score: +1

E.G. Daily

as Tommy Pickles in Nickelodeon Kart Racers 4

Score: +1

Rob Paulsen

as Carl Wheezer in Nickelodeon Kart Racers 4

Score: +1

Debi Derryberry

as Jimmy Neutron in Nickelodeon Kart Racers 4

Score: +1

Vincent Tong

as Zuko in Nickelodeon Kart Racers 4

Score: +1

Sabrina Fest

as Katara in Nickelodeon Kart Racers 4

Score: +2