Suggestions by @xylopiano

Nahatomb

as Purple in Fictional Characters by Colours of the Rainbow

Dr. Blowhole

as Mad scientist in House of Horror

Dave (Dr. Octavius Brine)

as Mad scientist in House of Horror

Barn Owl

as Grandmother Willow in If Disney Renaissance characters ('89-'99) were animals

Great Horned Owl

as Grandmother Willow in If Disney Renaissance characters ('89-'99) were animals

William Windom

as Grandpa in Klonoa (90's/00's Western Animation series)

Badrang the Tyrant

as Killed in a Duel in Fictional Characters Face Claim Sorted by Cause of Death

Mark Oliver

as Tenebrae Hue in Klonoa (90's/00's Western Animation series)

Mark Oliver

as Garlen in Klonoa (90's/00's Western Animation series)

Benedict Campbell

as Tenebrae Hue in Klonoa (90's/00's Western Animation series)

Hilary Duff

as Lolo in Klonoa (90's/00's Western Animation series)

Jennifer Love Hewitt

as Lolo in Klonoa (90's/00's Western Animation series)

James Earl Jones

as Tenebrae Hue in Klonoa (90's/00's Western Animation series)

Pat Fraley

as Nahatomb in Klonoa (90's/00's Western Animation series)

Pat Fraley

as Bagoo in Klonoa (90's/00's Western Animation series)

Pat Fraley

as Joka in Klonoa (90's/00's Western Animation series)

Scott McNeil

as Bagoo in Klonoa (90's/00's Western Animation series)

Scott McNeil

as Joka in Klonoa (90's/00's Western Animation series)

Jess Harnell

as Popka in Klonoa (90's/00's Western Animation series)

Rob Paulsen

as Popka in Klonoa (90's/00's Western Animation series)