sentences:  Simons was also a colorist on "Invader Zim" and in November 1998, the same month he auditioned for GIR, he also helped color the pilot episode.Vasquez said he gave Simons the part of GIR because he was "bad at it", and that fit the character.When voicing GIR, Simons' voice was edited to make it sound higher-pitched and metallic.