Planet 51

Planet 51 is a 2009 Spanish-American-British-movie 3D computer-animated science fiction comedy film directed by Jorge Blanco, written by Joe Stillman.

Plot
Lem is just an average teenager working on getting the girl and furthering his career at the local planetarium - except that he's an alien. At least to U.S. astronaut Captain Charles T. Baker who lands on Lem's planet hoping for a quick flag plant and a hasty return to earth and his millions of screaming fans. But on this alien planet the media has tagged spacemen as brain-eating, zombie-creating monsters, causing Baker to run for his life and into Lem's house. Now it's up to the green native to get the clumsy astronaut back to his spaceship before military dictator General Grawl and mad scientist Professor Kipple manage to exterminate the Earthly visitor.

Bad Qualities

 * 1) Hit-or-miss humor, with plenty of it being pop-culture references/jokes and innuendoes.
 * 2) Blatant product placement: particularly, there is a scene of Twix candy bars, as well as an iPod-looking device and many obvious references to other movies.
 * 3) The action scenes are so lame to the point where even the action scenes from other alien movies have done better.
 * 4) Misleading poster: In the film's poster (as seen above), it shows that Chuck Baker is the main character, but he's actually a side-character while Lem is actually the main character.
 * 5) Generic teen story for Lem.
 * 6) In some scenes, some of the characters don't move at all.
 * 7) Every background character has the same walking animation, which is lazy.
 * 8) The alien planet is far too earth-like. for example, the grass is green and the sky is blue, a boring visual that could have been avoided by choosing any other color.

Good Qualities

 * 1) Decent animation.
 * 2) Good voice acting, despite talents being wasted.
 * 3) Some funny moments here and there, like the scene where Chuck first encounters the aliens.
 * 4) The ending isn't too bad.
 * 5) Great soundtrack, especially for using 50s music.
 * 6) Rover is a funny and cute character.
 * 7) The concept is somewhat interesting, a man who discovers an planet inhabited with aliens who behave exactly like humans, sounds somewhat original.

Reception
Planet 51 recieved negative reviews from critics, and currently holds a 22% approval rating on Rotten Tomatoes, based on 108 reviews, with a general consensus that states: "Planet 51 squanders an interesting premise with an overly familiar storyline, stock characters, and humor that alternates between curious and potentially offensive." On Metacritic, the film has weighted an average score of 39 out of 100, indicating "generally unfavorable reviews." On IMDb, the average score is 6/10.