Xerxes
pet eel of Mozenrath in Disney's Aladdin TV series.
Xerxes
boy representing X, who got eaten by mice, in The Gashlycrumb Tinies by Edward Gorey
Xerxes
pet falcon of Peter Griffin in an episode of TV's "Family Guy"
Xerxes
ancient civilization in Fullmetal Alchemist: Brotherhood where the entire population was mysteriously wiped out in one night