Six of the original Total Drama Island contestants are replaced by characters from other animated shows, plus two additional contestants from other animated shows.
Bridgette = Jennifer "Jenny" Brown (Phineas And Ferb)
Duncan = George "Georgie" Williams (American Dad, Boyz 12/B12 boy band member)
Geoff = Francis Stone aka Hotstreak (Static Shock)
Gwen = Luna López (Scooby-Doo And The Witch's Ghost, The Hex Girls)
Lindsay = Terra Rock (Teen Titans)
Owen = CJ Casagrande (The Casagrandes)
Two new campers
Boris Titus (American Dad, Boyz 12/B12 boy band member)
Jessica Argota (Miraculous Ladybug)
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The characters of color's ethnic backgrounds:
Boris
Race: Arab
Skin color: Light brown
Ethnicity: Middle Eastern
Phenotype: Egyptian
CJ
Race: Indigenous
Skin color: Brown
Ethnicity: Hispanic
Phenotype: Mexican
Courtney
Race: Indigenous
Skin color: Light Brown
Ethnicity: Latina
Phenotype: Brazilian
DJ
Race: Black
Skin color: Light Brown
Ethnicity: Caribbean/Afro-Caribbean
Phenotype: Jamaican
Georgie
Race: Black
Skin color: Brown
Ethnicity: Caribbean/Afro-Caribbean
Phenotype: Trinidadian
Heather
Race: Asian
Skin color: Tan
Ethnicity: East Asian
Phenotype: Japanese
Jessica
Race: Indigenous
Skin color: Brown
Ethnicity: Native American
Phenotype: Pueblo Indian
Justin
Race: Asian
Skin color: Brown
Ethnicity: Polynesian/Pacific Islander
Phenotype: Hawaiian
Katie
Race: Asian
Skin color: Brown
Ethnicity: Southwest Asian
Phenotype: Malaysian
Leshawna
Race: Black
Skin color: Dark Brown
Ethnicity: African
Phenotype: Afro-Canadian
Luna
Race: Black
Skin color: Dark Brown
Ethnicity: Hispanic/Afro-Hispanic
Phenotype: Ghanaian/Afro-Dominican
Noah
Race: Asian
Skin color: Brown
Ethnicity: Southeast Asian
Phenotype: Indian
Sadie
Race: Asian
Skin color: Tan
Ethnicity: North Asian
Phenotype: Korean