The polite word for all this is "repurposing," a euphemism for "hauling someone else's garbage."
What are people saying?
What are critics saying?
The Hollywood Reporter by Frank Scheck
Strictly for the small-fry set, lacking the visual style, wit or imagination necessary to entice adult viewers.
New York Daily News by Jami Bernard
A dreadful animated movie stuffed with bad puns and little internal logic. More dangerous than the world icing over is the danger of eyeballs rolling back into the heads of parents accompanying kids to this.
The original English scripts certainly were peppered with sly, topical asides aimed squarely at adults. Paul Bassett Davies' updated screenplay attempts to follow suit, but what passes for topical these days is pretty much limited to industry inside jokes and constant allusions other movies. Thankfully, the animation itself is thoroughly inspired.
William H. Macy lends a little class as a snail, but Smith nails it in the closing-credit outtakes: "Don't expect Robin Williams-caliber work."
Doogal is one of those pickup-and-redub jobs, the original version having been made by European studio Pathé based on a 1960s British children’s show, "The Magic Roundabout." And lacking even the minimal pop-cultural pizzazz of "Hoodwinked," the story, dialogue and animation here really are for-kids-only.
San Francisco Chronicle by Peter Hartlaub
It's a movie that scrounges so desperately for laughs, it features both a flatulent moose and a flatulent train.