In one of the year's best-reviewed films, pampered pet mouse Roddy St. James thinks he's got it made.. until he's literally flushed away to a bustling underground world of ninja frogs, hench-rats and singing slugs. "More fun than Cars" (Neil Rosen, NY-1) and "Better than Ice Age 2" (Bill Bregoli, Westwood One), this outrageously inventive comedy-adventure is a flood of fun for both kids and grown-ups.