The creation of these characters brought the Square staff several challenges as "Final Fantasy X" was the first game in the franchise to feature voice acting and also had to feature multiple tribes from different parts from Spira with distinctive designs. Various types of merchandising have also been released. The characters from "Final Fantasy X" and its sequel were praised by video game publications owing to their personalities and designs. The English voice acting received a mixed response during their debut while in "Final Fantasy X-2" the dub received a better response.