I say Nee to you nay sayers who dislike this great movie Nee Nee Nee. You obviously have problems with anything that does not reach lofty literary standards. It seems you just don't get the idea. Perhaps you've only seen the movie once and missed things or slept through the plot. It's a complex plot and parody. Watch again and again if you need too but unless your thick as a lead brick you'll get it.
The movie has all the elements of a good parody. It makes fun of the government, the good space guys are not white, the girl that needs to be saved is not a Barbie doll yet she pulls of smart and sexy in a surprising way considering her ditsy name and first impression of a drunk loser she's shows her insight and gives the protagonist a someone to save. Females have been being saved since the dawn of time. In fiction, movies, cartoons, comics the list goes on someone has to save Polly Pureheart or in this case Penny Priddy first he saves her from herself then the bad guys. There is the mad scientist who's way over the top accent, ego and the whole enchilada, the unlikely 1950's era Japanese goog guy scientist tossed in to make us think. The beauty of the message is that things are not what they seem, there is a moral here that given thought is obvious to anyone capable of cognitive thought. It's entertaining and silly as possible. Almost every scene has parodies of society at the time this was made down to the ending with the Thrilleresq walk through the "LA River". Look again it's all there. To truly see ones mind must be as open as their eyes.