Mostly, "Yogi & the Invasion of the Space Bears" is another attempt to extend the supremely clever ursine's longevity just a little bit more. There is, however, one really interesting aspect. When Yogi and Bobo first meet their clones, the clones repeat everything said by Yogi and Bobo. This is similar to a condition called incipient echolalia (referenced in Kurt Vonnegut's novel "Breakfast of Champions"). A person with this condition repeats the last two or three words that she hears. Obviously, the duploids repeat the entire sentence, but it seems to be the same idea.
OK, too much analysis. The movie is nice, brief entertainment. It must suck to be the Ranger. Starring Daws Butler (in his final role), Don Messick, Maggie Roswell (now a "Simpsons" cast member) and Frank Welker.
Review by Lee Eisenberg from the Internet Movie Database.