According to "Rotten Tomatoes", "critics say the film is something of a Frankenstein's monster, stitching together recycled parts from "Shrek" and "The Nightmare Before Christmas". [...] While the pundits say "Igor" has moments of Tim Burton-esque visual invention, it's a pretty mediocre affair, filled with shopworn pop-culture references and manic action but few laughs; plus, it's probably a bit too dark for the wee ones." The site reports only 39% of 93 professional reviews being "fresh" as of December 2019; while the film holds a "mixed or average" aggregate score of 40/100 on Metacritic based on 19 reviews as of the same time. While "The Age" called "Igor" "a fun time-killer for kids aged tween and up;" "The Austin Chronicle" panned it for being uninspired in all aspects, such as animation, story, and voice acting; and "The New York Post" labeled it as "an excuse for a wearying parade of pop-culture references and voice cameos by celebrities," also calling its influences used more for "desperation than inspiration."