 While choosing a species for Perry , Povenmire and Marsh wanted to keep in mind selecting one that was uncommon , an animal that kids could not " pick out at a pet store and beg [ their parents ] for . " They chose a platypus because of the animal 's obscure and striking appearance . The animal was scarcely used in American animated programs , so the pair opined that Perry " would not have to compete with preconceived notions that viewers might bring to a more conventional critter . " The blank storyboard they were given allowed them to " make stuff up " since " no one knows very much about [ them ] . " 
 While choosing a species for Perry , Povenmire and Marsh wanted to keep in mind selecting one <a href='null_relcl' title='1'><mark>that</mark></a>was uncommon , an animal <a href='null_relcl' title='2'><mark>that</mark></a>kids could not " pick out at a pet store and beg [ their parents ] for . " They chose a platypus because of the animal <a href='null_genetive' title='3'><mark>'s</mark></a>obscure and striking appearance . The animal was scarcely used in American animated programs , so the pair opined that Perry " would not have to compete with preconceived notions <a href='null_relcl' title='4'><mark>that</mark></a>viewers might bring to a more conventional critter . " The blank storyboard they <a href='uninflect' title='5'><mark>were</mark></a> given allowed them to " make stuff up " since " no one <a href='uninflect' title='6'><mark>knows</mark></a> very much about [ them ] . " 
While choosing a species for Perry , Povenmire and Marsh wanted to keep in mind selecting one was uncommon , an animal kids could not " pick out at a pet store and beg [ their parents ] for . " They chose a platypus cuz of da animal  obscure and striking appearance . The animal was scarcely used in American animated programs , so the pair opined that Perry " would not gotta compete w preconceived notions viewers might bring to a more conventional critter . " The blank storyboard they was given allowed them to " make shii up " since " no one know very much about [ em ] . "